Artículos de revistas: "River Teesta"

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Saha, Anup Kumar. "Water Security in Bangladesh: A Case of the China-Bangladesh Teesta Project". Journal of South Asian Studies 11, n.º 2 (30 de agosto de 2023): 161–70. http://dx.doi.org/10.33687/jsas.011.02.4394.

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Water security is a fairly new concept in the field of security studies. The global water crisis and human vulnerability as a result of water shortages have heightened the utility of the concept of water security. The Teesta River in Bangladesh has been experiencing water shortages over many years, water security has remained elusive. Recently, China has attempted to resolve the Teesta River water crisis in collaboration with Bangladesh in order to meet its water security challenges. This study attempts to examine the efficacy of the China-led Teesta project on the Teesta River in Bangladesh from the lens of water security.

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2

Tamang, Pravesh. "Economic Valuation and Benefit Transfer of Restoring the Teesta Riverine Ecosystem". Nature Environment and Pollution Technology 22, n.º 1 (2 de marzo de 2023): 189–97. http://dx.doi.org/10.46488/nept.2023.v22i01.017.

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This study seeks to understand the socio-economic and ecological impacts of the hydroelectric power projects along the upper basin of the river Teesta in Sikkim. This study estimates the non-market benefits of restoring the Teesta riverine ecosystem and evaluates the transferability of welfare estimates. This study is a first of its kind undertaken in the Teesta basin which uses a unique dataset of 830 households obtained from the affected regions of the river basin. During the study, nine villages adjacent to the river Teesta, dams, and powerhouses were identified and surveyed. Double bounded dichotomous choice questions were used to elicit willingness to pay (WTP). Both the logistic and normal distribution models were fitted and the results were mostly similar. The median WTP was INR 373.00 and the variables that described the rating on dams, ownership of property, monthly expenditure of the household, informal employment status, and satisfaction about the state of the river Teesta were among the significant variables in the model. The benefit function value transfer estimated was INR 232.00 with the percentage transfer error (PTE) of 61.9%.

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Wiejaczka, Łukasz, Paweł Prokop, Rafał Kozłowski y Subir Sarkar. "Reservoir’s Impact on the Water Chemistry of the Teesta River Mountain Course (Darjeeling Himalaya)". Ecological Chemistry and Engineering S 25, n.º 1 (1 de marzo de 2018): 73–88. http://dx.doi.org/10.1515/eces-2018-0005.

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Abstract The article presents the role of the newly built reservoir in the formation of the hydrochemistry of water of the Teesta River (a tributary of the Brahmaputra) in its Himalayan course. Field research were performed in the post-monsoon season of the period 2013-2015. Sampling and measuring points were located in five points over 43 km of the Teesta River in the Darjeeling Himalaya. Analysis of water along of river longitudinal profile above and below the reservoir suggest that the reservoir caused decrease most of the basic ions concentrations (Cl−, K+, Na+, Mg2+, NO3− and PO43−). An inverse trend was observed only with respect to Ca2+, SO42− and NH4+. The dam does not influent on the F− concentration. The reservoir causes minor enrichment most of the heavy metals such Cu, Ni, Zn, Cr, Cd and Sr. The lower enrichment of Teesta water below the dam indicates the water self-purification processes for metals by the Teesta Reservoir. The changes of physicochemical properties and concentrations of ions caused by the reservoir are usually normalised by environmental factors before the Teesta River outlet from the Himalayas (within 15 km of the river).

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4

Rahaman, Muhammad Mizanur y Abdullah - Al - Mamun. "Hydropower development along Teesta river basin: opportunities for cooperation". Water Policy 22, n.º 4 (16 de junio de 2020): 641–57. http://dx.doi.org/10.2166/wp.2020.136.

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Abstract The aim of this research is to examine the hydropower development potentials and identifying major hydropower projects along the Teesta river basin that is shared by Bangladesh and India. The upstream of Teesta river basin is located mostly in hilly areas of Sikkim where India plans to produce electricity of over 6,500 MW by developing the hydropower potential of the basin. The downstream basin is densely populated, mostly flat land and has no hydropower potential. As of today, Bangladesh and India have been unable to agree on an integrated development plan for the Teesta river basin. Previous negotiations on Teesta river basin management have focused only on sharing water rather than sharing the wide range of benefits from water resources including hydropower. This paper identified the existing, ongoing and upcoming hydropower development projects. The hydropower sharing opportunity exists between the two riparian countries and this type of natural resource development could reduce economic tensions and provide a platform for sustainable agreements.

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5

Arfanuzzaman, Md y Qazi Kholiquzzaman Ahmad. "Assessing the regional food insecurity in Bangladesh due to irrigation water shortage in the Teesta catchment area". Water Policy 18, n.º 2 (6 de agosto de 2015): 304–17. http://dx.doi.org/10.2166/wp.2015.072.

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Bangladesh is losing huge food production from the Teesta catchment area due to a lack of availability of irrigation water in the dry and lean period because of unilateral water withdrawal in the upstream country, India. The area, which is directly dependent on the irrigation water of the Teesta river, is the study area for this paper. The study reveals that rice production in Dalia, Nilphamari, Sayedpur and Rangpur regions is badly affected by the irrigation water scarcity. It appears that production is particularly severely affected in Rangpur, making it a relatively more food insecure area in the Teesta basin. The major finding of this study is that more than 4.45 million metric tons of rice production have been missed from the Teesta catchment area since 2006–07, triggered by the massive irrigation failure of the Teesta Barrage Irrigation Project (TBIP) due to reduced water flow in the Teesta river. The total rice production missed in the north-western region since 2006–07 is more than the country's total rice import during 2008/09–2013/14 fiscal years and nearly one quarter of the total boro production in the 2012/13 fiscal year. This reduced food production renders the north-western part of the country a food insecure region from its own production.

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Amin, AKM Rohul, Md Rakibuzzaman Shah, Md Mahmood Alam, Imran Hoshan y Md Abu Zafar. "Study on the Present Status of Endangered Fishes and Productivity of Teesta River Closest to Barrage Region". Research in Agriculture Livestock and Fisheries 7, n.º 3 (31 de diciembre de 2020): 577–89. http://dx.doi.org/10.3329/ralf.v7i3.51730.

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This study was conducted to monitor the present condition of endangered fishes and productivity of Teesta river closest to Teesta barrage situated in the Lalmonirhat district of Bangladesh. Water and sediment samples were collected twice in a month during the study period from six different (3 upstream and 3 downstream) sites with three replications for each. Required information about threatened fishes was collected from the sampling region associated fishermen and fish markets. The study disclosed over 50 threatened fish species in Teesta river including several threatened fishes namely Bagarius bagarius, Sisor rabdophorus etc. The commonly available endangered fishes were Macrognathus aculiatus, Mastacembelus armatus, Barilius tileo, Raiamas bola, Botia dario, B. lohachata etc. which are rarely available in nationwide. Planktonic flora and fauna determination revealed that comparatively higher density of plankton (n >11500 per liter) as well as more number of planktonic flora (>21 nos.) and fauna (>9 nos.) were monitored in the early monsoon and monsoon season (April-September) and comparatively lower planktonic density (n<10000 per liter) and less number were found in premonsoon season (January-February). The investigation of benthic fauna showed that the riverine ecosystem near to barrage contained 16 species of macro-benthos from different groups. Lastly, it can be noticed that it is very essential to take all effective necessary actions to provide good productivity and conserve the ichthyo diversity of Teesta river that will help to conserve the commonly available endangered and critically endangered fishes of Teesta river. Res. Agric., Livest. Fish.7(3): 577-589, December 2020

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7

Arfanuzzaman, Md. "Economics of transboundary water: an evaluation of a glacier and snowpack-dependent river basin of the Hindu Kush Himalayan region". Water Policy 20, n.º 1 (21 de diciembre de 2017): 90–108. http://dx.doi.org/10.2166/wp.2017.071.

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Abstract The Himalayan rivers are recognized as a reliable source of water supply in the countries of the Hindu Kush Himalayan (HKH) region. Increasing need for food and energy for the growing population of the HKH region has stimulated water harvesting from the transboundary rivers and triggered water conflict, environmental degradation and socio-economic turmoil among the riparian nations. Teesta is one such mighty trans-Himalayan river flowing through India and Bangladesh and is recognized as a basin where there is increasing tension between these two nations. Due to upstream interventions including barrage, dam and hydropower construction, the lower riparian region of Bangladesh faces acute water stresses, which hamper the agricultural, fisheries and livelihood activities of the river-dependent communities and impede the economic prosperity of the greater north-west region. The study provides a robust outline of the transboundary nexus between India and Bangladesh, and identifies upstream intervention-induced economic loss and ecological deterioration in the lower Teesta basin. To encourage water collaboration between the riparian states, the study estimates the benefit of transboundary co-operation for the larger socio-economic prosperity and environmental sustainability in the Teesta basin of the Himalayan region, which is decidedly applicable to similar basins in the HKH region and the rest of the world.

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8

Saha, Abhirup, Prapti Das y Dhiraj Saha. "A preliminary assessment of butterfly diversity from Mekhliganj town, Cooch Behar District, West Bengal, India". Journal of Threatened Taxa 16, n.º 2 (26 de febrero de 2024): 24786–94. http://dx.doi.org/10.11609/jott.8137.16.2.24786-24794.

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In the present study, butterfly diversity from Mekhliganj town, which is located on the Teesta River bank of Cooch Behar District, West Bengal, India was studied. A total of 55 species of butterflies were recorded from the two study sites, out of which 22 species were observed for the first time from Cooch-Behar District, not recorded earlier. Out of these, five recorded species were legally protected under the Wildlife (Protection) Act (WPA), 1972 like Chliaria othona, Lampides boeticus, and Hypolimnas misippus. Therefore, efforts should be made for habitat conservation of the Teesta River bank.

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9

Mullick, Md Reaz Akter, Mukand S. Babel y Sylvain R. Perret. "Marginal benefit based optimal water allocation: case of Teesta River, Bangladesh". Water Policy 15, S1 (1 de marzo de 2013): 126–46. http://dx.doi.org/10.2166/wp.2013.004.

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This article describes a hydrologic–economic optimization model for allocating available river flow between competing off- and in-stream demands, based on the marginal benefits (MBs) of sectoral water uses in a segment of the Teesta River in Bangladesh. Irrigation, capture fishery and navigation are the main direct water uses considered. The value of irrigation water was estimated using the residual imputation method. Losses in yield caused by lowered irrigation supply, resulting from reduced river flow, formed the basis for establishing the total and MB functions for off-stream river water use (irrigation). Total and MB functions for in-stream water use (capture fishery, navigation) were developed using field survey data of beneficiaries' income as a function of river flow. Analysis was enhanced by applying AQUARIUS, which allocates water between users to maximize consumer surplus based on MB functions. Model results show that in-stream uses could not compete with off-stream uses in the case of the Teesta, as substantial benefit was obtained from irrigation. Environmental flow to safeguard river health and in-stream use was considered to be a constraint in the optimization, which results in a sizeable reduction in irrigation benefit with a small increase in in-stream benefit. The necessary trade-offs between economic efficiency and environmental protection are depicted, providing insight into a justifiable water allocation strategy for the Teesta.

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10

(Babu), Kudrat-E.-Khuda, Md Riaduzzaman ., Tahmina Akter y Sumaia Akther. "Negative Effects of the Urban River Pollution on the Environment and Human Health in Bangladesh". Nature Environment and Pollution Technology 22, n.º 3 (1 de septiembre de 2023): 1081–96. http://dx.doi.org/10.46488/nept.2023.v22i03.001.

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Based on research findings, Bangladesh’s river water, crucial for domestic, agricultural, and industrial use, has long been in a terrible situation. There have been numerous instances of significant contamination in the waterways surrounding Dhaka city, including the Buriganga River, and in Chattogram city, including the Karnaphuli River, over the past 40 years. The existing data demonstrate that other urban rivers, particularly Karatoa, Teesta, Rupsa, Pasur, and Padma, are also in severe condition due to the disposition of huge pollutants. Contaminants flowing with the water have severely polluted the downstream areas of the rivers. High metal concentrations are frequently observed in river water during the dry season. In the Buriganga River and at certain locations in the Turag, Balu, Sitalakhya, and Karnaphuli Rivers, the presence of dissolvable oxygen (DO) is nearly zero. NO3, NO2, and PO4-3 pollution has also occurred in many rivers. Most rivers have Cr, Zn, Fe, Pb, Cu, Cd, Mn, As, and Ni concentrations beyond the legal limit for drinking water. In contrast, some rivers have metal concentrations above the legal irrigation water limit. The majority of the rivers, particularly the peri-urban rivers in Dhaka city, Teesta, Korotoa, Rupsha, Karnaphuli, and Meghna Rivers, have significantly higher metal concentrations, according to sediment data. Metal concentrations in sediment are generally higher than USEPA standards in most rivers. Metal concentrations in fish and crops demonstrate metal bioaccumulation. The trend in metal concentration follows the order of water, fish, and sediment. It has been shown that crops irrigated with tainted water contain dangerous metals. The analysis of daily intake data on carcinogenic and noncarcinogenic substances reveals that consuming contaminated food can seriously impact human health.

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11

Thakur, P. K., P. R. Dhote, A. Roy, S. P. Aggarwal, B. R. Nikam, V. Garg, A. Chouksey et al. "SIGNIFICANCE OF REMOTE SENSING BASED PRECIPITATION AND TERRAIN INFORMATION FOR IMPROVED HYDROLOGICAL AND HYDRODYNAMIC SIMULATION IN PARTS OF HIMALAYAN RIVER BASINS". ISPRS - International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences XLIII-B3-2020 (21 de agosto de 2020): 911–18. http://dx.doi.org/10.5194/isprs-archives-xliii-b3-2020-911-2020.

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Abstract. The Himalayan region are home to the world’s youngest and largest mountains, and origins of major rivers systems of South Asia. The present work highlight the importance of remote sensing (RS) data based precipitation and terrain products such as digital elevation models, glacier lakes, drainage morphology along with limited ground data for improving the accuracy of hydrological and hydrodynamic (HD) models in various Himalayan river basins such as Upper Ganga, Beas, Sutlej, Teesta, Koshi etc. The satellite based rainfall have mostly shown under prediction in the study area and few places have are also showing over estimation of rainfall. Hydrological modeling results were most accurate for Beas basin, followed by Upper Ganga basin and were least matching for Sutlej basin. Limited ground truth using GNSS measurements showed that digital elevation model (DEM) for carto version 3.1 is most accurate, followed by ALOS-PALSAR 12.5 DEM as compared to other open source DEMs. Major erosion and deposition was found in Rivers Bhagirathi, Alakhnanda, Gori Ganga and Yamuna in Uttarakhand state and Beas and Sutlej Rivers in Himachal Pradesh using pre and post flood DEM datasets. The terrain data and river cross section data showed that river cross sections and water carrying capacity before and after 2013 floods have changed drastically in many river stretches of upper Ganga and parts of Sutlej river basins. The spatio-temporal variation and evolution of glacier lakes was for lakes along with GLOF modeling few lakes of Upper Chenab, Upper Ganga, Upper Teesta and Koshi river basin was done using time series of RS data from Landsat, Sentinel-1 and Google earth images.

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12

Sarkar, Tapan. "Diversity and conservation status of malacofauna from the river Teesta,West Bengal, India". Asian Journal of Conservation Biology 11, n.º 2 (2022): 240–46. http://dx.doi.org/10.53562/ajcb.75122.

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A survey on malacofauna in the river Teesta from March 2014 to February 2016 was done by using caste net of mesh size 0.5 mm. A total of 9 species belonging to 7 families were reported. All thesespecies are under Least Concern (LC) category. One invasive species Physellaacuta also reported from the river Teesta. Of the 9 species, 7 are edible molluscs. Diversity indices and PCA were done by PAST software. Number of taxa, dominance index, Shannon diversity index, evenness index and Margalef’s richness index were ranged from3-7, 0.123-0.50, 0.868-2.149, 0.5659-0.9531 and 0.8049-2.25respectively. Shannon diversity index and evenness index were maximum during monsoon and minimum during winter season.

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13

Das, Soumik, Pritha Datta, Dreamlee Sharma y Kishor Goswami. "Trends in Temperature, Precipitation, Potential Evapotranspiration, and Water Availability across the Teesta River Basin under 1.5 and 2 °C Temperature Rise Scenarios of CMIP6". Atmosphere 13, n.º 6 (9 de junio de 2022): 941. http://dx.doi.org/10.3390/atmos13060941.

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Considering the linkages between climate change and water management, a lack of effort has been observed in analyzing the imprints of climate change over the transboundary Teesta river basin, where the changing climatic conditions can trigger substantial changes in eco-hydrological and socio-politico-economic setups. Therefore, to stimulate effective basin management, we investigated the trends in temperature, precipitation, potential evapotranspiration, and water availability under 1.5 and 2 °C warming levels across the transboundary Teesta river basin. The ensemble median of five bias-corrected model outputs from the Coupled Model Intercomparison Project Phase 6 (CMIP6) was used for this purpose. The results indicate that the temperature is expected to significantly increase (decrease) in the near (far) future, along with an overall significant increasing trend in monsoon precipitation. The evaporation paradox is found in the near future, and the water availability is likely to increase, with some exceptions for the pre-monsoon season. The perpetuation of such changes might result in environmental degradation through snow melting, glacial recession, and floods. Anticipating the changing climatic scenarios and their possible impacts, in this study, we recommend a variety of short- and long-term strategies for the concerned stakeholders to implement the Sustainable Development Goal 13, i.e., “Climate Action”, over the Teesta river basin.

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Parvej, Masud, Kazi Mohammad Masum, Md Sahinur Islam Fahim y Mohammad Redowan. "Three Decades of River Bank Erosion and Accretion Appraisal Along Bank Line Shifting Trend in A Transboundary River, Teesta Floodplain of BangladeshThree Decades of River Bank Erosion and Accretion Appraisal along Bank Line Shifting Trend in a Transbounda". Geoplanning: Journal of Geomatics and Planning 11, n.º 1 (27 de diciembre de 2023): 1–16. http://dx.doi.org/10.14710/geoplanning.11.1.1-16.

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As the world's largest delta, Bangladesh possesses distinctive geomorphology dominated by transboundary rivers, making it vulnerable to climatic hazards such as river erosion that causes severe loss of land and other resources. Using four Landsat imageries of 1991, 2001, 2011 and 2021 the current study analyzed the amount and trend of river erosion and accretion on the Teesta Floodplain of Bangladesh for three decades. Findings indicate that the Teesta River experiences severe bank erosion and accretion regularly, causing bank line shifting and thus significant affecting the land-use/land-cover (LULC) change of the area. Between 1991 and 2021, approximately 194 square kilometers of land were eroded, while an equivalent area of land was accreted. Approximately 1072 km2 of agricultural land was converted into other categories, with the settlement area gradually increasing. This trend of changes shows that agricultural land and water-bodies will reduce in the next two decades while barren land and settlement areas will increase. The agricultural lands and barren lands have a greater chance of being occupied by settlement areas. At the same time, crop production patterns will move to those crops that require less water due to the reduction of water-bodies. Reduced flow during the dry season and massive discharge during the monsoon from India's Gajoldoba barrage caused massive siltation and erosion. Comprehensive river management and restoration with an intergovernmental treaty or understanding between India and Bangladesh is required to resolve this crisis in the long run.

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15

G N, RAHA, BANDYOPADHYAY S y DAS S. "Heavy rainfall analysis over Teesta catchment and adjoining areas of Sub-Himalayan West Bengal and Sikkim". MAUSAM 71, n.º 1 (4 de agosto de 2021): 133–44. http://dx.doi.org/10.54302/mausam.v71i1.12.

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Heavy rainfall (HRF) forecasting in hilly region is always a challenge to the operational forecasters. Synoptic Analogue Model (SAM) is considered as one of the useful tools for HRF forecasting in topographically influenced hilly regions. In every monsoon season, the Teesta river catchment and its adjoining areas in Sub-Himalayan West Bengal and Sikkim (SHWB-S) generally receive several events of HRF. With the primary objective to find the method to issue HRF warning over Teesta river catchment and adjoining areas in SHWB-S, a SAM has been developed by analyzing 18 years (1998-2015) data comprising prevailing synoptic situations affecting the area and daily rainfall data of subsequent day of HRF. In addition, impact of different synoptic systems on the distribution of HRF has also been studied. The results revealed that there exists a good agreement between daily HRF warnings issued with the corresponding HRF event observed over this region on the next day.

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Sarkar, Tapan. "Cold water fish diversity and their conservation status in Teesta,Jaldhak, Torsa, Kaljani and Sankosh Rivers of the Dooars region, West Bengal, India". Asian Journal of Conservation Biology 10, n.º 1 (julio de 2021): 146–52. http://dx.doi.org/10.53562/ajcb.wimq5691.

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A survey was conducted on the cold water fish diversity in the different rivers of the Dooars region with the help of fisherman. Data was collected on the monthly basis by using different nets. A total of 71 cold water fishes were reported during the study period. Most dominant family was cyprinidae with 32 species followed by Sisoridae with 12 species; Balitoridae 8 and Bagridae with 4 species etc. 70 cold water fish species in the river Teesta, 63 in Jaldhaka, 66 in Torsa, 61 in Kaljani and 66 in the river Sankosh were recorded. Ten Endangered and 31 Vulnerable species were reported from all the five rivers. Out of 71 cold water fishes many have consumption and ornamental value. Many migratory and sport cold water fishes are also reported. Catch frequency status indicates many fishes found rare and extremely rare during the study.

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17

Parvin, Rozina, Md Shafiqul Bari y Noor Muhammad. "Impacts of Climate Change on Teesta River Basin Char Lands: A Study of Livelihood and Ecosystem Dynamics in Bangladesh". International Journal of Environment and Climate Change 14, n.º 2 (10 de febrero de 2024): 407–22. http://dx.doi.org/10.9734/ijecc/2024/v14i23956.

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This study anticipates identifying how does climate change affect the livelihood and ecosystem of char land of Teesta River basin char land. Structured questionnaire and related documents were used for both primary and secondary data collection. Survey was conducted in two districts (Rangpur and Nilphamari) and four unions (Lakhitari, Topa Madhupur, Shatibari, Gulmund) of four upazilas (Gangachara, Kaunia, Dimla, Jaldhaka). A total of 50 respondents from each selected char union was selected following a multistage random sampling procedure. Thus, there was altogether 200 respondents selected for this study. Data related to age, education level, occupation, knowledge about climate change of char inhabitants and perception of char dwellers regarding climate change was measured. A total number of 93% of the respondents clearly grasp that climate change refers to changes in long-term typical weather. It was observed that ongoing climate change has 78% impact on agriculture followed by health of peoples and other animals that is 20%. In the rainy season they observed increase in lightning from sun as the highest effect of climate change that has a WAI of 1.77. Teesta river basin people perceived dry spell frequency as the second highest extent of climate change that had a WAI of 1.74 followed by timing of rain offset, uneven distribution of rainfall and timing of rain onset. According to their perception it was found that great extent of loss was found in skills of char peoples (48.35%) followed by knowledge of char peoples (44.27%). It was also observed that a third great extent of loss was found in char peoples good health (41.67%) followed by ability to work (39.06%). Out of all the respondents 166 (43.2%) observed that soil is becoming dry day by day due to climate change followed by rivers becoming dry (37.8%) (Table 8). They found that growing trees have become difficult (45.1%), due to drought underground water is decreasing (61.7%) and air became dry due to climate change, and these are small extent of loss. Char inhabitants observed that climate change impact on physical capital and great extent impact was perceived on people's migration to another place (41.4%). Teesta River basin char dwellers opined about 24 adaptation strategies to reduce the impact of climate change on livelihood and ecosystem in that area.

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Mukhopadhyay, Tanmay y Soumen Bhattacharjee. "Genetic Diversity and Population Structure Analyses of Threatened Amblyceps mangois from Sub-Himalayan West Bengal, India Through Rapd and ISSR Fingerprinting". Croatian Journal of Fisheries 77, n.º 1 (1 de marzo de 2019): 33–50. http://dx.doi.org/10.2478/cjf-2019-0004.

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Abstract Amblyceps mangois or the “Indian torrent catfish” is a tropical, freshwater, hill-stream species that has ornamental-commercial value and has been included within the “Endangered” category in the list of threatened freshwater fishes of India. A total fourteen populations from the Terai and Dooars region of northern West Bengal, India were analyzed to study the genetic architecture of this species with the help of RAPD and ISSR markers. The observed number of alleles (S), Nei’s gene diversity (H) and Shannon’s information index (H´ or I) showed the highest values in the Teesta river system and the lowest values in the Mahananda river system. The UPGMA-based dendrogram and PCoA, based on RAPD and ISSR fingerprints, showed that the Mahananda and the Teesta river populations formed a group distinct from the remaining Jaldhaka river population. We further considered the fourteen riverine populations into nine groups according to the continuity of the water flow for SHE analysis. It was found that the three components, i.e. the pattern of diversity (H´), richness (S) and evenness (E), have varied and fluctuated across all fourteen populations from higher to lower altitude as the river flows downstream. AMOVA, PhiPT and genetic hierarchical analyses showed that a distinct hierarchical structure is present in Amblyceps populations in the study region. Low levels of genetic diversity/variation and genetic hierarchical structure with high genetic divergence were found in the present study as an indicator of the recent picture of threatened status of this species. This study is the initial attempt to characterize and evaluate the genetic architecture of the species from this region and there is a scope to manage the evolutionary significant units (ESU) for conservation purpose.

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Thakur, Parikshit. "River Churni: Assessing Trans boundary River Pollution and Options for Livelihood Protection". Electronic Journal of Social and Strategic Studies 03, n.º 01 (2022): 21–40. http://dx.doi.org/10.47362/ejsss.2022.3102.

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Trans-boundary Rivers are one of the major causes of conflict among the riparian states. Mathabhanga Churni is one of such 54 shared rivers between India and Bangladesh flowing in the Ganga Brahmaputra river basin which is a major source of fresh water as well as livelihood support to the people of its riverbanks for various reasons. The water quality of Churni deteriorated due to industrial waste disposal by a company, located in Bangladesh, in the river Churni. Moreover, in Indian side there are open defecation in the river Churni along with industrial and municipal waste disposal which are responsible for degradation of water quality affecting the livelihood of the common people of the riverbank of both sides. Initiatives have been taken to revive the course of river and purify its water quality by the National Green Tribunal, local environmental activists, like-minded people and organizations through awareness programme and protest. The article argues that initiatives for revival of the river Churni were taken by local activists and Government agencies but there is an acute absence of trans-boundary attention from both sides. While both the countries are busy with the Teesta and the Ganga as a result diplomatic parleys, government officials seem to have ignored the issue of pollution in the river Churni which can actually act as a catalyst for inculcating trans-boundary water diplomacy. It finds that diplomatic or bilateral engagements, issues revolving around Centre-State relations also need to be addressed in order to prevent an ecological disaster on both sides of the boundary and also to sustain livelihoods.

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Raihan, ML, MA Sarker y MAM Miah. "Shortage of water in Teesta river basin and its impact on crop production in northern Bangladesh". SAARC Journal of Agriculture 15, n.º 2 (25 de enero de 2018): 113–23. http://dx.doi.org/10.3329/sja.v15i2.35163.

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The objectives of the study were to (i) assess the extent of water shortage in the downstream of Teesta River Basin (TRB) areas; (ii) explore the problems associated with crop production due to water shortage in TRB areas and (iii) examine the impact of water shortage on crop production in TRB areas. The study was conducted in four villages under Nilphmari district during April, 2015. By secondary data analysis and farmers’ perception it was clear that water flow and discharge of Teesta river was decreasing significantly during the last 15 years. The major impact was the dramatic increase in costs of irrigation of major crops and ultimately rise in the costs of production and less profit from farming. All of the farmers (100%) opined that the irrigation costs of major crops have been increasing due to shortage of water. The cultivation of LWRC due to water shortage was also a major impact of water shortage on crop production. Farmers were concentrating more on cultivating maize, tobacco, wheat, different types of vegetables etc. compared to rice particularly in dry season. Different types of problems like increased amount of heavy metal in crop land due to continuous uplifting of ground water, decrease soil fertility, increase pests and diseases to crops, fallowing of high and medium high land, increase of fertilizer and pesticide costs etc. were affecting farmers severely in crop production.SAARC J. Agri., 15(2): 113-123 (2017)

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21

Kumar, Ravi, Pratibha Prakash, Naveen Malik y Sudha Tiwari. "An assessment of factors influencing morphometry of the Himalayan rivers Chenab and Teesta". Ecology, Environment and Conservation 29 (2023): 291–95. http://dx.doi.org/10.53550/eec.2023.v29i02s.047.

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Water resource is rapidly falling short to meet the needs of the population worldwide. The unjust anthropogenic activities have led countries to water stressed/scarce conditions, higher number of hydrological disasters such as floods, droughts and descending levels of groundwater. Being an alpine region, the trans Himalayan region is among the most susceptible regions of the world to the climate change. In this study, the comparative morphometric assessment was made of the eastern and western regions of the alpine zones of the Himalayas. Morphometry of the river basin is a step towards water resource management which provides baseline statistical data about river water. Both river basins were compared using morphometric parameters and further on the basis of 4th order watersheds. The study revealed significant differences in both the basins where the upper Chenab basin has a comparatively higher water discharge, more powerful geological control and lesser basin lag time. The upper Teesta basin demands more management strategies to cope up with higher soil erosion and floods.

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Qamar, Mohd Ziaul, Manoj Kumar Verma, Asit Meshram y Neena Isaac. "Model studies for desilting basin for Teesta-VI H.E. project, Sikkim – a case study". Brazilian Journal of Development 10, n.º 1 (16 de enero de 2024): 1157–70. http://dx.doi.org/10.34117/bjdv10n1-076.

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Desilting basins play an important role in run-of-river hydro power projects on Himalayan Rivers. These rivers carry huge amount of sediment with them, due to steep slopes and fragile geology of the region. The suspended sediment enters through the power intake and ultimately the power house. This causes heavy damage to the turbines and other under water parts. Therefore, desilting basins are provided to eliminate suspended sediment from the water conductor system. The design of desilting basin is verified on a physical model for 90% removal of suspended sediment coarser than 0.2 or 0.3 mm and efficacy of flushing tunnel below in transporting the settled sediment. Central Water and Power Research Station, Pune has conducted physical model studies for desilting basin for various hydro power projects in India and neighbouring countries. One such study, Hydraulic model studies for desilting basin for 500 MW Teesta-VI Hydro Electric Project, Sikkim is presented in this paper. Various design parameters such as length of desilting basin, length and bed slope of inlet transition, outlet transition, size of silt flushing tunnel, size and spacing of openings connecting main basin with silt flushing tunnel etc. were tested during the model studies. The results in terms of settling efficiency for 0.3 mm size particles were obtained.

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23

Das, Mantu, Mst Tania Parveen, Deep Ghosh, Abhisek Sarkar, Jiarul Alam y Snehasish Saha. "Unstable Behavioral Pattern of Teesta River and Its Impact on Riverine Dwellers: A Case Study of Confluence Area of Teesta and Dharala River, India". African Journal of Humanities and Social Sciences 4, n.º 1 (5 de febrero de 2024): 24–49. http://dx.doi.org/10.51483/afjhss.4.1.2024.24-49.

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24

Sarkar, Showmitra Kumar, Swapan Talukdar, Atiqur Rahman, Shahfahad y Sujit Kumar Roy. "Groundwater potentiality mapping using ensemble machine learning algorithms for sustainable groundwater management". Frontiers in Engineering and Built Environment 2, n.º 1 (2 de noviembre de 2021): 43–54. http://dx.doi.org/10.1108/febe-09-2021-0044.

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PurposeThe present study aims to construct ensemble machine learning (EML) algorithms for groundwater potentiality mapping (GPM) in the Teesta River basin of Bangladesh, including random forest (RF) and random subspace (RSS).Design/methodology/approachThe RF and RSS models have been implemented for integrating 14 selected groundwater condition parametres with groundwater inventories for generating GPMs. The GPM were then validated using the empirical and bionormal receiver operating characteristics (ROC) curve.FindingsThe very high (831–1200 km2) and high groundwater potential areas (521–680 km2) were predicted using EML algorithms. The RSS (AUC-0.892) model outperformed RF model based on ROC's area under curve (AUC).Originality/valueTwo new EML models have been constructed for GPM. These findings will aid in proposing sustainable water resource management plans.

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25

Indrakishor, Manish Kumar, Muskan y Vaibhav sharma. "Application of Cloudburst Prediction System: A Review". Industrial Engineering Journal 51, n.º 07 (2022): 32–37. http://dx.doi.org/10.36893/iej.2022.v51i7.032-037.

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Abrupt and powerful downpours known as "cloudbursts" can cause disastrous flash floods, landslides, and damage to infrastructure. Twenty-three army troops were washed away and five people killed as a result of the recent flood in Sikkim triggered by a cloudburst over Lhonak Lake in north Sikkim, which overflowed and raised the water levels in the Teesta River. Researchers have created a system based on Convolutional Neural Networks (CNN), weather forecasting, and data mining approaches for weather prediction by modeling meteorological data in order to address the urgent challenge of anticipating and managing cloudburst incidents. The suggested approach in this research describes a real-time cloudburst prediction system that makes use of sophisticated anomaly detection techniques and is based on a machine learning model.

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Gupta, Vikram, Neha Chauhan, Ivanna Penna, Reginald Hermanns, John Dehls, Aniruddha Sengupta y Rajinder K. Bhasin. "Geomorphic evaluation of landslides along the Teesta river valley, Sikkim Himalaya, India". Geological Journal 57, n.º 2 (3 de enero de 2022): 611–21. http://dx.doi.org/10.1002/gj.4377.

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27

Bera, R., B. D. Paul, N. B. Sinha, A. Guchhait y G. Maity. "Sikkim's Teesta River fog, mist and dust particle monitoring using monostatic LiDAR". IEEE Aerospace and Electronic Systems Magazine 23, n.º 7 (julio de 2008): 25–27. http://dx.doi.org/10.1109/maes.2008.4579288.

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28

Bari, Estiaque y A. Haque. "The Economics of Taming Teesta River: Limits the Choice of Agricultural Crop Diversification". Asian Journal of Agricultural Extension, Economics & Sociology 9, n.º 4 (10 de enero de 2016): 1–13. http://dx.doi.org/10.9734/ajaees/2016/22827.

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Mullick, Md Reaz Akter, Sylvain R. Perret y Mukand S. Babel. "Benefit functions for instream water uses – a case of the Teesta River, Bangladesh". Journal of Applied Water Engineering and Research 1, n.º 2 (diciembre de 2013): 118–28. http://dx.doi.org/10.1080/23249676.2013.875490.

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Mullick, Md Reaz Akter, Mukand S. Babel y Sylvain R. Perret. "Discharge-based economic valuation of irrigation water: Evidence from the Teesta River, Bangladesh". Irrigation and Drainage 60, n.º 4 (14 de diciembre de 2010): 481–92. http://dx.doi.org/10.1002/ird.597.

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31

Rahman, MM, MR Rahman y M. Asaduzzaman. "Establishment of Dams and Embankments of Frontier River of North East Part of India: Impact on North-Western Region of Bangladesh". Journal of Science Foundation 8, n.º 1-2 (16 de abril de 2013): 1–12. http://dx.doi.org/10.3329/jsf.v8i1-2.14614.

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India has built barrages on 17 more rivers in the east and northeast border with Bangladesh. Most of these dams and embankments act as the main barrier to flow water towards downstream like Bangladesh. As a result the rivers of Bangladesh that comes from India are falling in crisis of proper water. A study showed about 30 rivers of north-western part of Bangladesh gets very few water only due to dams and embankment made by India at the upstream of those rivers. Such massive water control projects of India are clearly a threat for a state that lies down of those. Unfortunately, and often ironically, national leaders of our country prefer to negotiate this sensitive matter rather than to make a strong protect of this inhuman and unethical activities. What is more astonishing news is that some time our state policy makers like to keep silent and avoid about it. India is always ready to controlling nature to serve economic development rather than addressing issues of trans-boundary and socio-environmental responsibilities. In fact, Indian plan to divert the water of Frontier Rivers is increasing at an alarming rate for Bangladesh. Here one thing is mentionable that is this types of project even harmful for India also. And peoples of north western state of India are in against of such harmful and high ambitious unnecessary project. Some time they also make a protest against it. Recently China and India are going to establish a large dam at the up Stream of Brahmaputra River. It would impair Indias own plan to link approximately thirty of its own rivers, a project that is bound to affect the downstream riparian state of Bangladesh. As a result drastic fall in the water flow of Teesta during the lean season, especially in February and March will occur in more frequent and will seriously hampers irrigation in Bangladesh. Such international trans-boundary river development projects raise many important issues. They never consider the impact that will impose upon the down stream part like Bangladesh. DOI: http://dx.doi.org/10.3329/jsf.v8i1-2.14614 J. Sci. Foundation, 8(1&2): 1-12, June-December 2010

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32

Salam, Roquia, Bonosri Ghose, Badhon Kumar Shill, Md Aminul Islam, Abu Reza Md Towfiqul Islam, Md Abdus Sattar, G. M. Monirul Alam y Bayes Ahmed. "Perceived and actual risks of drought: household and expert views from the lower Teesta River Basin of northern Bangladesh". Natural Hazards 108, n.º 3 (17 de mayo de 2021): 2569–87. http://dx.doi.org/10.1007/s11069-021-04789-4.

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AbstractDisaster risk perception and risk appraisal are essential in formulating an appropriate disaster risk reduction policy. This study examines the actual vs perceived drought risks by constructing risk indices at the household and expert levels using survey data from the lower Teesta River Basin in northern Bangladesh. The survey data were collected from 450 farmers using a structured questionnaire conducted between August and September 2019. A composite drought risk index was developed to understand households’ perceived and actual risks in the designated areas. The results show that the actual and perceived risk values differ significantly among the three case study sites locally known as Ganai, Ismail, and Par Sekh Sundar. The risk levels also differ significantly across the households’ gender, income, occupation, and educational attainment. People with insolvent socioeconomic status are more prone to drought risk compared to others. Results also reveal that the mean level of perceived risk agrees well with the actual risk, whereas females perceive comparatively higher risk than their male counterparts. Expert views on drought risk are similar to the individual household level perceived risk. The outcomes of this study would assist the policymakers and disaster managers to understand the concrete risk scenarios and take timely disaster risk reduction actions for ensuring a drought-resistant society.

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33

Talukdar, Swapan, Bonosri Ghose, Shahfahad, Roquia Salam, Susanta Mahato, Quoc Bao Pham, Nguyen Thi Thuy Linh, Romulus Costache y Mohammadtaghi Avand. "Flood susceptibility modeling in Teesta River basin, Bangladesh using novel ensembles of bagging algorithms". Stochastic Environmental Research and Risk Assessment 34, n.º 12 (4 de septiembre de 2020): 2277–300. http://dx.doi.org/10.1007/s00477-020-01862-5.

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34

Mondal, Md Sanaul Haque, Takehiko Murayama y Shigeo Nishikizawa. "Determinants of Household-Level Coping Strategies and Recoveries from Riverine Flood Disasters: Empirical Evidence from the Right Bank of Teesta River, Bangladesh". Climate 9, n.º 1 (29 de diciembre de 2020): 4. http://dx.doi.org/10.3390/cli9010004.

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Although recurrent floods cause detrimental impact for the people living in riverine floodplains, households are taking up various risks management strategies to deal with them. This paper examined household’s post-disaster coping strategies to respond and recover from riverine floods in 2017. Data were collected through a questionnaire survey from 377 households from the right bank of Teesta River in Bangladesh. Households employed different coping strategies including borrowing money, assets disposal, consumption reduction, temporary migration, and grants from external sources, to cope with flood. Results from logistic regression models suggested that increasing severity of flood reduced households’ consumption. Exposed households were more likely to borrow money. Consumption reduction and temporary migration were mostly adopted by agricultural landless households. Income from nonfarm sources was found to be an important factor influencing household’s decisions on coping. Furthermore, households that recovered from the last flood disaster seek insurance through their own savings and available physical assets, highlighting the role of disaster preparedness in resilient recovery. This study calls for the policy intervention at the household-level to enhance the adaptive capacity of riverine households so that people at risk can cope better and recover from flood disaster using their resources.

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35

ISLAM, Fakrul y Yoshiro HIGANO. "Environmental Problems and Water Resource Management in Floodplains: Evidence from the Teesta River Basin, Bangladesh". Studies in Regional Science 31, n.º 1 (2000): 31–39. http://dx.doi.org/10.2457/srs.31.31.

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ISLAM, Fakrul y Yoshiro HIGANO. "Equitable Sharing of Bilateral International Water: A Policy Measure for Optimal Utilization of the Teesta River". Studies in Regional Science 32, n.º 1 (2001): 17–32. http://dx.doi.org/10.2457/srs.32.17.

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Islam, Sahidul y Subaran Chandra Sarker. "Assessing Biogeomorphological State of the Teesta River Flood Plain: A Study on Gangachara Upazila, Rangpur, Bangladesh". International Journal of Geosciences 08, n.º 02 (2017): 265–75. http://dx.doi.org/10.4236/ijg.2017.82011.

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38

Khan, Rahat, H. M. Touhidul Islam y Abu Reza Md Towfiqul Islam. "Mechanism of elevated radioactivity in Teesta river basin from Bangladesh: Radiochemical characterization, provenance and associated hazards". Chemosphere 264 (febrero de 2021): 128459. http://dx.doi.org/10.1016/j.chemosphere.2020.128459.

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39

Singh, Vishal, Ashutosh Sharma y Manish Kumar Goyal. "Projection of hydro-climatological changes over eastern Himalayan catchment by the evaluation of RegCM4 RCM and CMIP5 GCM models". Hydrology Research 50, n.º 1 (14 de septiembre de 2017): 117–37. http://dx.doi.org/10.2166/nh.2017.193.

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Abstract Here, a regional climate model (RCM) RegCM4 and Coupled Model Intercomparison Project phase 5 (CMIP5) global climate models (GCMs) such as Coupled Physical Model (CM3), Coupled Climate Model phase 1 (CM2P1) and Earth System Model (ESM-2M) with their representative concentration pathway (RCP) datasets were utilized in projecting hydro-climatological variables such as precipitation, temperature, and streamflow in Teesta River basin in north Sikkim, eastern Himalaya, India. For downscaling, a ‘predictor selection analysis’ was performed utilizing a statistical downscaling model. The precision and applicability of RCM and GCM datasets were assessed using several statistical evaluation functions. The downscaled temperature and precipitation datasets were used in the Soil and Water Assessment Tool (SWAT) model for projecting the water yield and streamflow. A Sequential Uncertainty Parameter Fitting 2 optimization algorithm was used for optimizing the coefficient parameter values. The Mann–Kendall test results showed increasing trend in projected temperature and precipitation for future time. A significant increase in minimum temperature was found for the projected scenarios. The SWAT model-based projected outcomes showed a substantial increase in the streamflow and water yield. The results provide an understanding about the hydro-climatological data uncertainties and future changes associated with hydrological components that could be expected because of climate change.

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40

Rahman, Md Mizanur, D. S. Arya, N. K. Goel y Anand Prakash Dhamy. "Design Flow and Stage Computations in the Teesta River, Bangladesh, Using Frequency Analysis and MIKE 11 Modeling". Journal of Hydrologic Engineering 16, n.º 2 (febrero de 2011): 176–86. http://dx.doi.org/10.1061/(asce)he.1943-5584.0000299.

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41

Rahman, Md Mizanur y Hamidul Huq. "Implications of ICT for the Livelihoods of Women Farmers: A Study in the Teesta River Basin, Bangladesh". Sustainability 15, n.º 19 (2 de octubre de 2023): 14432. http://dx.doi.org/10.3390/su151914432.

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Rural agrarian societies, like Bangladesh, rely substantially on women as primary contributors to crop production. Their involvement covers a broad spectrum, from the first stage of seed sowing to the ultimate phase of marketing agricultural products. Information and communication technology (ICT) in agriculture could be a transformative tool for women’s agricultural involvement. Despite the inherent challenges associated with ICT adoption, it has emerged as an effective catalyst for improving the livelihoods of rural women in Bangladesh. This study investigates the impacts of ICT on the livelihoods of rural women. This study concurrently addresses the challenges that infringe upon its sustainability. The study was conducted within Oxfam Bangladesh’s ICT interventions implemented upon the women farmers in Dimla Upazila, Nilphamari, Bangladesh. We employed a mixed-methods research approach to examine the multilayered impacts of ICT on women farmers’ livelihoods. Our findings indicate that ICT support has improved the livelihoods of rural women through a comprehensive capital-building process encompassing human capital, social capital, financial capital, physical capital, and political capital, facilitated by creating an enabling environment. The study also unfolded several challenges stemming from aspects of ICT integration, including the disappearance of indigenous agroecological knowledge and the disruption of traditional multicropping practices. In light of the study’s outcomes, a key recommendation emerges, emphasizing the importance of integrating indigenous agroecological knowledge in the widescale implementation of ICT initiatives. Acknowledging and accommodating indigenous knowledge can enhance the sustainability of ICT-driven livelihood enhancements for rural women in Bangladesh.

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42

Chaubey, Pawan Kumar, Rajesh Kumar Mall y Prashant K. Srivastava. "Changes in Extremes Rainfall Events in Present and Future Climate Scenarios over the Teesta River Basin, India". Sustainability 15, n.º 5 (6 de marzo de 2023): 4668. http://dx.doi.org/10.3390/su15054668.

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Globally, changes in hydroclimate extremes such as extreme precipitation events influence water resources, natural environments, and human health and safety. During recent decades, India has observed an enormous increase in rainfall extremes during the summer monsoon (June to September) seasons. However, future extreme rainfall events have significant uncertainty at the regional scale. Consequently, a comprehensive study is needed to evaluate the extreme rainfall events at a regional river basin level in order to understand the geomorphological characteristics and pattern of rainfall events. In the above purview, the current research focuses on changes in extreme rainfall events obtained through observed gridded datasets and future scenarios of climate models derived through the Coupled Model Intercomparison Project (CMIP). The results highlight a significant rise in the extremes of precipitation events during the first half of the 21st century. In addition, our study concludes that accumulated precipitation will increase by five days in the future, while the precipitation maxima will increase from 200 to 300 mm/day at the 2-year, 50-year, and 100-year return periods. Finally, it is found that during the middle of the 21st century the 23.37% number of events will increase over the TRB at the 90th percentile.

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43

Starkel, Leszek, Łukasz Wiejaczka y Krzysztof Kiszka. "Role of Tributaries in Shaping the Middle Course of the Himalayan River Teesta after the 1968 Extreme Floods". Current Science 112, n.º 09 (1 de mayo de 2017): 1896. http://dx.doi.org/10.18520/cs/v112/i09/1896-1903.

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44

Akhter, Shumona, Kutub Uddin Eibek, Shakibul Islam, Abu Reza Md Towfiqul Islam, Ronghao Chu y Shen Shuanghe. "Predicting spatiotemporal changes of channel morphology in the reach of Teesta River, Bangladesh using GIS and ARIMA modeling". Quaternary International 513 (abril de 2019): 80–94. http://dx.doi.org/10.1016/j.quaint.2019.01.022.

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45

Jana, Kaushik, Debasis Sengupta y Kalyan Rudra. "Correction of bifurcated river flow measurements from historical data: Paving the way for the Teesta water sharing treaty". Annals of Applied Statistics 10, n.º 3 (septiembre de 2016): 1757–75. http://dx.doi.org/10.1214/16-aoas958.

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46

Ali, Sheikh Nawaz, Anupam Sharma, Shailesh Agrawal, M. G. Yadava, R. A. Jani, Jyotsna Dubey y P. Morthekai. "Oxygen and deuterium isotope characteristics of Teesta river catchment from Sikkim Himalaya, India: Implications of different moisture sources". GEOCHEMICAL JOURNAL 54, n.º 5 (2020): 327–36. http://dx.doi.org/10.2343/geochemj.2.0604.

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47

Tsering, Tenzin, Mahmoud S. M. Abdel Wahed, Sidra Iftekhar y Mika Sillanpää. "Major ion chemistry of the Teesta River in Sikkim Himalaya, India: Chemical weathering and assessment of water quality". Journal of Hydrology: Regional Studies 24 (agosto de 2019): 100612. http://dx.doi.org/10.1016/j.ejrh.2019.100612.

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Chakrabarty, M. y S. Homechaudhuri. "Fish guild structure along a longitudinally-determined ecological zonation of Teesta, an eastern Himalayan river in West Bengal, India". Arxius de Miscel·lània Zoològica 11 (diciembre de 2013): 196–213. http://dx.doi.org/10.32800/amz.2013.11.0196.

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49

Saha, Manika, Suman Sengupta, Biswajit Sinha y Dipu Kumar Mishra. "Assessment of physico-chemical properties, some heavy metals and arsenic of river teesta in Jalpaiguri district, West Bengal, India". Asian Journal of Research in Chemistry 10, n.º 3 (2017): 399. http://dx.doi.org/10.5958/0974-4150.2017.00068.2.

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Amin, AKM Rohul, Md Abu Zafar, Md Shafiullah Abbus, Muhammad Badruzzaman y Imran Hoshan. "An assessment of vital water quality parameters of Teesta River closest to barrage region in Lalmonirhat district of Bangladesh". International Journal of Fisheries and Aquatic Studies 8, n.º 6 (1 de noviembre de 2020): 92–95. http://dx.doi.org/10.22271/fish.2020.v8.i6b.2365.

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