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Автор: Grafiati

Опубліковано: 6 вересня 2023

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1

Stacey, David Beresford, and V. R. Visweswaran. "Water resources development in the Cauvery river basin, India." Proceedings of the Institution of Civil Engineers - Engineering History and Heritage 166, no. 2 (May 2013): 106–18. http://dx.doi.org/10.1680/ehah.12.00009.

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2

Vedula, S. "Optimal irrigation planning in river basin development: The case of the Upper Cauvery river basin." Sadhana 8, no. 2 (March 1985): 223–52. http://dx.doi.org/10.1007/bf02811895.

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3

Porchelvi, R. Sophia, and P. Selvavathi. "An Assessment of Drinking Water Quality in Cauvery Delta Region and Palar Region, Tamil Nadu." Scholedge International Journal of Multidisciplinary & Allied Studies ISSN 2394-336X 3, no. 12 (April 2, 2017): 238. http://dx.doi.org/10.19085/journal.sijmas031201.

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Анотація:

Delta regions of the Cauvery River basin are one of the significant areas of rice production in India. In spite of large-scale utilization of the river basin for irrigation and drinking purposes, the lack of appropriate water management has seemingly deteriorated the water quality due to increasing anthropogenic activities. Vellore is the second most populous district of Tamil Nadu in India where the Palar River flowing towards east for about 295 Km. Vellore is surrounded by many leather tanneries and small scale dying industries and their effluents are discharged into the Palar river causing impact on the quality of the underground water. To assess the extent of deterioration, physicochemical characteristics of surface water were analyzed select regions of Cauvery Delta River basin and Palar region, Tamil Nadu, during March 2016 to May 2016. This study aimed to examine quality of drinking groundwater. The results represented whether the water was suitable or unsuitable for drinking purposes in this area. It was also observed that some areas like Tiruvarur, Needamangalam, Kamalapuram, Arcot, Soraiyur, Ranipet had low quality drinking water. It is suggested to take some necessary measures for supplying desirable water to the people living in these areas.

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4

Vanham, D., R. Weingartner, and W. Rauch. "The Cauvery river basin in Southern India: major challenges and possible solutions in the 21st century." Water Science and Technology 64, no. 1 (July 1, 2011): 122–31. http://dx.doi.org/10.2166/wst.2011.554.

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India is facing major challenges in its water resources management (WRM) sector. Water shortages are attributed to issues such as an explosion in population, rapid urbanization and industrialization, environmental degradation and inefficient water use, all aggravated by changing climate and its impacts on demand, supply and water quality. This paper focuses on the contemporary and future situation in the Cauvery river basin in Southern India, shared by different states, predominantly Karnataka and Tamil Nadu. As water issues largely fall under the authority of the states, inter-state water disputes have a long tradition in the Cauvery river basin. Future changes in precipitation during the two monsoon seasons will only increase these tensions. Both states depend on the arrival of these monsoon rains to water their crops and to replenish the groundwater. The paper identifies the major challenges and general possible solutions for sustainable WRM within the river basin. It synthesises the relevant literature, describes practices that should be addressed in the scope of integrated WRM – including water availability increase and demand management – and stresses the need for further quantitative analyses.

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5

Sunil, C., R. K. Somashekar, and B. C. Nagaraja. "Riparian vegetation assessment of Cauvery River Basin of South India." Environmental Monitoring and Assessment 170, no. 1-4 (December 19, 2009): 545–53. http://dx.doi.org/10.1007/s10661-009-1256-3.

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6

Subramanian, V., L. t’ Dack, and R. Grieken. "Preliminary studies on the geochemistry of the Cauvery river basin." Journal of Earth System Science 94, no. 2 (July 1985): 99–110. http://dx.doi.org/10.1007/bf02871942.

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7

Sreenivasan, Naren, and Joshua Barton. "Freshwater medusae Limnocnida indica Annandale, 1911 in the Cauvery Wildlife Sanctuary, Dubare Reserve Forest and Shivanasamudram in Karnataka, India, with a commentary note on the exotic Craspedacusta sowerbii Lankester, 1880." Journal of Threatened Taxa 13, no. 3 (March 26, 2021): 18035–38. http://dx.doi.org/10.11609/jott.6609.13.3.18035-18038.

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Анотація:

Fifty years after the first report of freshwater medusae (Limnocnida indica) from Cauvery River in Krishanrajasagar Reservoir, there has been only one other published report of its occurrence in the Cauvery Basin at Hemavathi Reservoir, Kodagu District. Recent interest in freshwater photography has revealed three more locations in the Cauvery Basin where medusae are found. Medusae are often observed at these locations but are erroneously identified as invasive species. According to published literature, this is true of Craspedacusta sowerbii, a cosmopolitan species with only three confirmed reports from India. All these reports were from artificial structures such as ponds and aquaria. The native Limnocnida and exotic Craspedacusta can be distinguished from each other visually and with respect to temporal variation in the occurrence of their free swimming medusae. This short note is intended to shed light on the status, distribution, and field identification of L. indica, a species endemic to the Western Ghats of India.

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8

Stalin, Manjula, and Hema Achyuthan. "Hydromorphological interpretations using morphometric analysis: The cauvery river basin, Tamil Nadu." Asian Journal of Research in Social Sciences and Humanities 7, no. 7 (2017): 333. http://dx.doi.org/10.5958/2249-7315.2017.00390.2.

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9

Ekka, Anjana, Saket Keshav, Saket Pande, Pieter van der Zaag, and Yong Jiang. "Dam-induced hydrological alterations in the upper Cauvery river basin, India." Journal of Hydrology: Regional Studies 44 (December 2022): 101231. http://dx.doi.org/10.1016/j.ejrh.2022.101231.

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10

Loganathan, P., and AB Mahindrakar. "Intercomparison of statistical downscaling models: a case study of a large-scale river basin." Climate Research 83 (May 6, 2021): 147–60. http://dx.doi.org/10.3354/cr01642.

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Climate change assessment at a local scale requires downscaling of general circulation models (GCMs) using various approaches. In this study, statistical downscaling using established machine learning techniques is compared with the proposed extreme gradient boosting decision tree (EXGBDT) technique. The Cauvery river basin in southern peninsular India, which is known for its frequent droughts and floods, was considered in this study. The ACCESS 1.0 CMIP5 historical GCM simulation was used for downscaling the local climate with the help of daily observation data from 35 stations located in the study zone. An intercomparison of model performance in predicting daily weather variables such as precipitation and average, maximum, and minimum temperatures over the upper, middle, and lower Cauvery river basin was performed. The findings show that mean-variance is around 15% and bias is negligible for the proposed EXGBDT model, which is better than other models under consideration. The NSE and R2 values range from 0.75-0.85 for both training and testing periods. The intercomparison of monthly mean values of observed and downscaled data for different sub-basins and parameters suggests higher model efficiency. The lower variance observed in the comparison of CLIMDEX indices suggests that the EXGBDT model performance is better in representing the local climatic condition.

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11

Knight, J. D. M., A. Rai, R. K. P. D’souza, and B. Vijaykrishnan. "Range extension of Pethia nigripinna (Cyprinidae) to Karnataka, India." TAPROBANICA 7, no. 1 (January 19, 2015): 47–48. http://dx.doi.org/10.47605/tapro.v7i1.157.

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Анотація:

The black-finned barb, Puntius nigripinnis Knight et al., 2012 currently designated to the genus Pethia Pethiyagoda et al., 2012 is a little known barb described from the east flowing Cauvery River basin. The present knowledge on the range of Pethia nigripinna is based only from its original description, as there have been no subsequent records of this species from the Western Ghats. Until now, P. nigripinna is known to occur only in Kalindhi stream, Kabini River in Wayanad, Kerala and Kakkan halla, Moyar River, Tamil Nadu.

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12

G, Thirumaran, Ganesan C.M, and Nandakumar K. "ETHNOMEDICINAL STUDIES ON RIVER STRETCH CAUVERY BASIN OF NANJAI EDAYAR AND KUCHIPALAYAM, NAMAKKAL DISTRICT, TAMIL NADU." Kongunadu Research Journal 1, no. 2 (December 30, 2014): 116–20. http://dx.doi.org/10.26524/krj51.

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The study area covers about 15 km stretch in the perennial river bed, Cauvery which supports semievergreen to dry deciduous types of forests. Ethnomedicinal information on 26 plant species was recorded during the extensive field survey carried out in this stretch during 2011-2013. The information covers botanical names, vernacular names, family, plant parts used and the mode of usage

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13

Gowri, R., and P. P. Mujumdar. "Evaluation of geomorphologic similarity between the sub-catchments of Cauvery river basin." IOP Conference Series: Earth and Environmental Science 491 (July 8, 2020): 012015. http://dx.doi.org/10.1088/1755-1315/491/1/012015.

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14

Ramanathan, A. "Nature and transport of solute load in the cauvery river basin, India." Water Research 28, no. 7 (July 1994): 1585–93. http://dx.doi.org/10.1016/0043-1354(94)90225-9.

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15

Vaithiyanathan, P., Al Ramanathan, and V. Subramanian. "Sediment transport in the Cauvery River basin: sediment characteristics and controlling factors." Journal of Hydrology 139, no. 1-4 (November 1992): 197–210. http://dx.doi.org/10.1016/0022-1694(92)90202-7.

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16

Ramya, V. L., S. Sibina Mol, D. S. Krishna Rao, Preetha Panikkar, M. Karthikeyan, P. K. Jesna, M. E. Vijaykumar, and U. K. Sarkar. "New Record of Trichogaster lalius (Hamilton, 1822) from Thippagondanahalli Reservoir (Cauvery River Basin)." International Journal of Current Microbiology and Applied Sciences 8, no. 10 (October 10, 2019): 2521–28. http://dx.doi.org/10.20546/ijcmas.2019.810.292.

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17

Kaliprasad, CS, PR Vinutha, and Y. Narayana. "Natural Radionuclides and Radon Exhalation Rate in the Soils of Cauvery River Basin." Air, Soil and Water Research 10 (January 1, 2017): 117862211774694. http://dx.doi.org/10.1177/1178622117746948.

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In this study, systematic measurement of activity concentrations of 40K, 226Ra, and 232Th and radon exhalation rate has been done in soil samples of Cauvery River environment. The activity was measured using HPGe gamma-ray spectrometer, and the mean values of 40K, 226Ra, and 232Th in the soil samples were found to be 182 ± 4, 34 ± 2, and 19 ± 1 Bq kg−1, respectively. The radon exhalation rate was measured by “Can technique” using SSNTD (LR-115) films. The mean values of radium concentration, surface exhalation, and mass exhalation rate were found to be 118.95, 293.61, and 108.53 mBq kg−1 h−1, respectively. The radiological hazard indices due to natural radioactivity were calculated and compared with international recommended values, which are lower than the recommended level. The radon exhalation rate is lower than the recommended level.

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18

L. Collins, Sarah, Sian E. Loveless, Sekhar Muddu, Sriramulu Buvaneshwari, Romesh N. Palamakumbura, Maarten Krabbendam, Dan J. Lapworth, et al. "Groundwater connectivity of a sheared gneiss aquifer in the Cauvery River basin, India." Hydrogeology Journal 28, no. 4 (April 8, 2020): 1371–88. http://dx.doi.org/10.1007/s10040-020-02140-y.

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19

., G. Mahalakshm. "Assessment of Surface Water Quality of Noyyal River Using Wasp Model." Asian Journal of Engineering and Applied Technology 7, no. 1 (March 5, 2018): 37–40. http://dx.doi.org/10.51983/ajeat-2018.7.1.865.

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The Noyyal River is a tributary of river Cauvery has been one of the most predominant and important rivers of Tamil Nadu. Unfortunately, certain stretches of river Noyyal are polluted due to effluent discharge from the industries and domestic sewage. The effective water environmental management strategies required to be implemented in this river to upgrade the water quality and to ensure sustainable development in the region. The aim of this work was to provide a basis for water environmental management in process of making important decisions. In this study WASP (Water Quality Simulation Program) is used as a model to identify the processes that underlie river water quality problems in a basin. WASP was recommended by EPA used as water quality model. Simulated values of Nitrate (NO3), Dissolved Oxygen (DO), Total Dissolved Solids (TDS), Alkalinity and pH demonstrated the accuracy of the model and despite a significant data shortage in the study area. WASP model was found to be an acceptable tool for the assessment of water quality.

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20

Verma, Sugam, P. Parthiban, K. Ravikumar, I. C. Das, and Ashutosh Das. "Steady-state Assessment of Hydraulic Potential at Water Scarce regions of Agniyar River Basin, India using GMS-MODFLOW." Disaster Advances 16, no. 5 (April 15, 2023): 38–43. http://dx.doi.org/10.25303/1605da038043.

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Although the Agniyar river basin, a segment of the Cauvery River basin, hosts a sizable agricultural community whose primary source of income is underground water supply, the area has been experiencing escalating water scarcity for decades. The present research work is carried out to address the lack of a research base in this region and to create a comprehensive groundwater baseline information system for studying the impacts of natural and anthropogenic activities, using GMS MODFLOW with Monte-Carlo simulation-based groundwater level dataset. The model, thus developed, can be calibrated with contemporaneous recharge and discharge data regularly so that the output may be used to make policy decisions in sustainable exploration of groundwater resources. The model also provides the locations of subsurface flood cells which can be potential water harvesting sites. Besides, the present modelling framework can be extended to other water-scarce regions as well.

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21

Patel, Shivshanker Singh, and Parthasarathy Ramachandran. "A Comparison of Machine Learning Techniques for Modeling River Flow Time Series: The Case of Upper Cauvery River Basin." Water Resources Management 29, no. 2 (June 19, 2014): 589–602. http://dx.doi.org/10.1007/s11269-014-0705-0.

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22

Gowri, R., Pankaj Dey, and P. P. Mujumdar. "A hydro-climatological outlook on the long-term availability of water resources in Cauvery river basin." Water Security 14 (December 2021): 100102. http://dx.doi.org/10.1016/j.wasec.2021.100102.

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23

Kavitha, E., and L. Paramesh. "Estimation of U, 226Ra, and 210Po Concentrations in Cauvery River Basin, South Interior Karnataka Region, India." Radiochemistry 60, no. 1 (January 2018): 92–99. http://dx.doi.org/10.1134/s1066362218010149.

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24

Kavitha, E., M. S. Chandrashekara, and L. Paramesh. "226Ra and 210Po concentration in drinking water of Cauvery river basin south interior Karnataka State, India." Journal of Radiation Research and Applied Sciences 10, no. 1 (January 2017): 20–23. http://dx.doi.org/10.1016/j.jrras.2015.08.001.

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25

Prabhu, M. Vijay, and S. Venkateswaran. "Delineation of Artificial Recharge Zones Using Geospatial Techniques in Sarabanga Sub Basin Cauvery River, Tamil Nadu." Aquatic Procedia 4 (2015): 1265–74. http://dx.doi.org/10.1016/j.aqpro.2015.02.165.

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26

Solaraj, Govindaraj, Selvaraj Dhanakumar, Kuppuraj Rutharvel Murthy, and Rangaswamy Mohanraj. "Water quality in select regions of Cauvery Delta River basin, southern India, with emphasis on monsoonal variation." Environmental Monitoring and Assessment 166, no. 1-4 (June 4, 2009): 435–44. http://dx.doi.org/10.1007/s10661-009-1013-7.

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27

Bhave, Ajay Gajanan, Declan Conway, Suraje Dessai, and David A. Stainforth. "Water Resource Planning Under Future Climate and Socioeconomic Uncertainty in the Cauvery River Basin in Karnataka, India." Water Resources Research 54, no. 2 (February 2018): 708–28. http://dx.doi.org/10.1002/2017wr020970.

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28

S., Raveesha, M. G. Chandrakanth, Shreeshail Rudrapur, Nagaraj Kusagur, and Ashoka N. "Real Investment on Ground Water in Cauvery Basin Areas of Karnataka- An Economic Analysis." International Journal of Economic Plants 7, no. 1 (February 28, 2020): 025–28. http://dx.doi.org/10.23910/2/2020.0314.

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Анотація:

In this study, irrigation wells located under canal command (GWCI) (Gadabanaalli), the irrigation wells located under tank command (GWTI) (Echanur), receiving the Hemavathy river water, with a water spread of 363 acres and another village Kibbanahalli where groundwater wells are located independently (called groundwater under sole irrigation GWSI), which depend only on rainfall source have been considered. Only farmers possessing irrigation wells in each of the three scenarios were chosen. A random sample of 35 farmers was drawn from each of the three scenarios, thus, totaling 105 for the purpose of this study. It was observed that the real investment was falling over the years with a range of Rs. 3137 to Rs. 6255 even though the nominal investment ranged between Rs. 19100 and Rs. 66600 for farmers in GWTI. Real investment on irrigation wells shows a declining trend in all the three situations. Thus, the real cost of groundwater is falling over time not exhibiting ricardian scarcity. In GCTI farmers, the real investment for working well was falling over the years with a range of Rs. 1815 to Rs. 6225 even though the nominal investment ranged between Rs. 20600 and Rs. 73987, the mean real investment per well was Rs. 5103, and the mean nominal investment per well was Rs. 40352. Considering the nominal cost of extraction of groundwater, it was clear that there was an increasing trend due to inflation and associated factors. However, the real cost of extraction was found to be consistent over the years.

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29

Ghosh, Nilanjan, and Jayanta Bandyopadhyay. "A scarcity value based explanation of trans-boundary water disputes: the case of the Cauvery River Basin in India." Water Policy 11, no. 2 (April 1, 2009): 141–67. http://dx.doi.org/10.2166/wp.2009.017.

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Анотація:

The paper is an attempt to interpret trans-boundary water disputes with the help of scarcity value, which is the value that could have been generated if the limit on water availability could be relaxed by one unit. Scarcity value measures the degree of deprivation and creates the basis for disputes. This hypothesis has been applied in this paper to the disputes over water use for irrigation in the Cauvery basin between the states of Karnataka and Tamil Nadu in South India. On the basis of the historical data for the area under paddy cultivation in the two states, the paper shows that such disputes are not clearly based on physical scarcity of water but are a temporal coincidence of demand based on scarcity value. This means that enhanced supply would not be the correct approach to the resolution of disputes. New economic instruments based on scarcity value may provide a more objective picture of the disputes and hence help in their amicable resolution.

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30

Jena, Pravat, K. S. Kasiviswanathan, and Sarita Azad. "Spatiotemporal characteristics of extreme droughts and their association with sea surface temperature over the Cauvery River basin, India." Natural Hazards 104, no. 3 (September 5, 2020): 2239–59. http://dx.doi.org/10.1007/s11069-020-04270-8.

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31

Arulbalaji, P., and D. Padmalal. "Sub-watershed Prioritization Based on Drainage Morphometric Analysis: A Case Study of Cauvery River Basin in South India." Journal of the Geological Society of India 95, no. 1 (January 2020): 25–35. http://dx.doi.org/10.1007/s12594-020-1383-6.

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32

Suresh, M., B. Gurugnanam, S. Vasudevan, K. Dharanirajan, and N. Jawahar Raj. "Drinking and irrigational feasibility of groundwater, GIS spatial mapping in upper Thirumanimuthar sub-basin, Cauvery River, Tamil Nadu." Journal of the Geological Society of India 75, no. 3 (March 2010): 518–26. http://dx.doi.org/10.1007/s12594-010-0045-5.

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33

THAMPY, DENCIN RONS, AGIN GEORGE KURIAN, K. REMA DEVI, and RAHUL G. KUMAR. "The identity of Rasbora neilgherriensis (Teleostei: Danionidae), with a re-description." Zootaxa 4894, no. 2 (December 9, 2020): 261–68. http://dx.doi.org/10.11646/zootaxa.4894.2.5.

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Анотація:

Rasbora neilgherriensis Day, long considered a synonym of Rasbora daniconius or Rasbora dandia, is re-described and shown to be a valid species based on an examination of type and recently-acquired topotypical specimens from the Western Ghats of India. The species is characterised by a complete lateral line with 32–34 pored scales on body, ½5–6/1/2½ scales in transverse line on body, a mid-lateral stripe that is 2½ scales wide anterior to the pelvic fin and 1–1½ scales wide on the caudal peduncle, and a caudal fin that is emarginate to forked with broadly rounded lobes. The species was recorded from the Cauvery River Basin in Kerala and Tamil Nadu, India, at elevations ranging from 710 m to 2015 m above sea level, in stream stretches with relatively denser riparian canopy cover.

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34

Pradeep, T., and S. Ananda Kumar. "Assessment of Groundwater Quality for Agricultural Purposes in Lower Part of Noyyal Sub-Basin, Cauvery River, Tamil Nadu, India." Asian Journal of Research in Social Sciences and Humanities 6, no. 7 (2016): 961. http://dx.doi.org/10.5958/2249-7315.2016.00480.9.

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35

Natarajan, P. M., Shambhu Kallolikar, G. Rengaraju, and S. T. Sambandam. "Surface and Groundwater Resources Management in Quantity and of Quality in the Kattar Sub-Basin Watershed of Cauvery River Basin, Tamil Nadu State, India." Proceedings of the Water Environment Federation 2013, no. 6 (January 1, 2013): 7198–208. http://dx.doi.org/10.2175/193864713813726966.

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36

Satish Kumar, Kuruva, Pallakury AnandRaj, Koppala Sreelatha, Deepak Singh Bisht, and Venkataramana Sridhar. "Monthly and Seasonal Drought Characterization Using GRACE-Based Groundwater Drought Index and Its Link to Teleconnections across South Indian River Basins." Climate 9, no. 4 (April 3, 2021): 56. http://dx.doi.org/10.3390/cli9040056.

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Анотація:

Traditional drought monitoring is based on observed data from both meteorological and hydrological stations. Due to the scarcity of station observation data, it is difficult to obtain accurate drought distribution characteristics, and also tedious to replicate the large-scale information of drought. Thus, Gravity Recovery and Climate Experiment (GRACE) data are utilized in monitoring and characterizing regional droughts where ground station data is limited. In this study, we analyzed and assessed the drought characteristics utilizing the GRACE Groundwater Drought Index (GGDI) over four major river basins in India during the period of 2003–2016. The spatial distribution, temporal evolution of drought, and trend characteristics were analyzed using GGDI. Then, the relationship between GGDI and climate factors were evaluated by the method of wavelet coherence. The results indicate the following points: GRACE’s quantitative results were consistent and robust for drought assessment; out of the four basins, severe drought was noticed in the Cauvery river basin between 2012 and 2015, with severity of −27 and duration of 42 months; other than Godavari river basin, the remaining three basins displayed significant negative trends at monthly and seasonal scales; the wavelet coherence method revealed that climate factors had a substantial effect on GGDI, and the impact of Southern Oscillation Index (SOI) on drought was significantly high, followed by Sea Surface Temperature (SST) Index (namely, NINO3.4) and Multivariate El Niño–Southern Oscillation Index (MEI) in all the basins. This study provides reliable and robust quantitative result of GRACE water storage variations that shares new insights for further drought investigation.

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37

Anbazhagan, Vinothkannan, Rajaram Rajendran, Ganeshkumar Arumugam, and Arun Ganeshan. "Identification of Heavy Metal Pollution Source Due to Idol Immersion Activity Across the Cauvery River Basin, Tamil Nadu, South India." Current Science 120, no. 1 (January 10, 2021): 200. http://dx.doi.org/10.18520/cs/v120/i1/200-208.

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38

Kannan, R., S. Venkateswaran, M. Vijay Prabhu, and K. Sankar. "Drainage morphometric analysis of the Nagavathi watershed, Cauvery river basin in Dharmapuri district, Tamil Nadu, India using SRTM data and GIS." Data in Brief 19 (August 2018): 2420–26. http://dx.doi.org/10.1016/j.dib.2018.07.016.

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39

Thampy, Dencin Rons, M. R. Sethu, M. Bibin Paul, and C. P. Shaji. "Ichthyofaunal diversity in the upper-catchment of Kabini River in Wayanad part of Western Ghats, India." Journal of Threatened Taxa 13, no. 2 (February 27, 2021): 17651–69. http://dx.doi.org/10.11609/jott.6159.13.2.17651-17669.

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We present here a detailed account of the diversity, distribution, threats, and conservation of freshwater fishes in the upper-catchment of the Kabini River in the Wayanad part of the Western Ghats Biodiversity Hotspot. A total of 136 fish species belonging to 13 orders, 29 families, and 69 genera were recorded. Order Cypriniformes dominated with five families, 36 genera, and 84 species, and Cyprinidae was the dominant family represented by 51 species within 21 genera. The true diversity of ichthyofauna in this catchment, is still unclear and requires further exploration and taxonomic studies. At least 44 species recorded during the study are endemic to the Western Ghats, of which 16 are endemic to the Cauvery River System and two species endemic to the Kabini Catchment. A total of 20 non-native fish species were recorded from the study area, of which six species were inter-basin (within India) transplants and 14 species were exotic. Among the native species with confirmed identity, four are Critically Endangered (CR) and nine Endangered (EN) as per the IUCN Red List of Threatened Species. As a part of the study, we also extend the distribution ranges of Opsarius malabaricus, Laubuka trevori, Opsarius bendelisis, Puntius cauveriensis, Oreichthys coorgensis, Mesonoemacheilus pambarensis, Hypselobarbus curmuca, and Pseudosphromenus cupanus to the Kabini Catchment. The presence of four species, which were earlier considered to be endemic to the west flowing rivers of the Western Ghats, viz, Laubuka fasciata, Hypselobarbus kurali, Sahyadria denisonii, and Puntius mahecola, in an east flowing stream is reported and discussed. Deforestation and removal of riparian vegetation, pollution, stream channel modification, sand mining, destructive fishing practices, dams and other impoundments, monsoon fishing, and non-native species are the major threats to freshwater fishes in the region. Strategies for the conservation of aquatic ecosystems in the Kabini Catchment are discussed.

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V, Ganesh, Ajey Kumar V G, Aravindan S, Sudha Ravindranath, and Vidya A. "Estimation and Analysis of Rainfall Runoff for Urban Hydrology using TR 55 SCS CN and GIS Approach in Hebbal Valley of Bengaluru, South India." International Journal of Recent Technology and Engineering (IJRTE) 10, no. 3 (September 30, 2021): 215–20. http://dx.doi.org/10.35940/ijrte.c6484.0910321.

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Urban floods are increasing frequently and severely. Climate change is usually attributed to urban floods with insufficient evidence. While in certain cases this appears to be true, the influence of landscape change in urban growth is more important. This study analyses development of an urban landscape with the complexity of established cities and combines physiographic data for the assessment of peak surface runoff in the study area, Hebbal valley. A portion of the Cauvery river basin draining into the Pinakini river in the district of Bangalore. It encompasses a 305.21 sq.km region in East Bengaluru and North Bengaluru. The land use and land cover classification was classified as 14 different categories: dark, light, roads and vegetation. The region of study has undergone unpredictable expansion and changes in the Land Use Land Cover in the last two decades. Several flood occurrences have occurred in different regions of Hebbal Valley throughout recent years. Rainfall analysis conducted between 1970 and 2018 with 1596mm of greatest precipitation. For the study, several space and non-space data were collected and thematic maps were produced. Runoff estimates for 2018 were made for 24 micro water sheds in the Hebbal Valley using SCS-CN TR55 technique for urban hydrology. The objective of this study is to determine the quantity of peak runoff produced, to develop better urban management techniques. The finding shows that rush volume has increased in recent years as land use patterns have changed and precipitation intensity has increased substantially over shorter periods. The study suggests spatial intervention efforts to provide suitable buildings and measures for flood flow.

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Mutharaj, D., and A. S. Rayamane. "A REVIEW ON PRODUCTION OF MAJOR CROPS IN RAMANAGARA DISTRICT." Geographical Analysis 9, no. 1 (June 5, 2020): 30–34. http://dx.doi.org/10.53989/bu.ga.v9i1.6.

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Ramanagara is a dry district of Karnataka, which was reconstituted as a separate district from Bengaluru rural in 2007. This region is located in the Cauvery River Basin, primarily agrarian in character with 47% of its total area under agriculture and allied crops. The present study is a review of agricultural profile of Ramanagara district and an assessment of the trends of the production of major agricultural crops of this district over a span of 8 years (2010-2017). Based on the annual reports and other reports published by the government of Karnataka, the secondary data of major crops, its production and productivity has been obtained. Comparative tables have been prepared and the trends of production and productivity of the crops in 2010- 11, 2013-14 and 2016-17 has been assessed using bar charts. Secondary Data on Physical parameters has also been obtained from the annual reports for the above years. A correlation analysis has been performed to understand whether the physical factors have any influence on the production and productivity of the major crops. From the results it is understood that there is no significant influence by the physical factors on crop production. Hence several other reasons such as changing land use pattern, decreasing soil fertility, market demand may have the influence on the production of major agricultural crops, which gives a scope of further research in this region. Keywords: Agriculture; Productivity; Major crops; Soil fertility & Market

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L, Kathirvel, Manikandan M, Raviraj A, and Baskar M. "Evaluation of Parallel Pipe Subsurface Drainage System in a Waterlogged Paddy Field." Madras Agricultural Journal 108, March (2021): 1–7. http://dx.doi.org/10.29321/maj.10.000474.

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Inadequate natural drainage facilities and flat lands causes, some of the Cauvery river basin command are suffering waterlogging and alkalinity problems during the canal water supply and period of excess rainfall. Subsurface drainage system is the method to lower the depth to groundwater level below the root zone and creates a favorable environment for crop growth. A study aimed to evaluate the performance of the parallel pipe subsurface system installed in farmers’ field at Sembari village, Lalgudi Taluk, Trichy District, Tamil Nadu in a waterlogged paddy field from October 2020 to February 2021. The field experiment was conducted with the combination of three lateral drain spacing (7.5, 10.0 and 12.5 m) and two drain depths (60 and 80 cm). 63 mm PVC perforated pipes wrapped with coir envelope were laid as lateral drains at a grade 0.3%. Inspection chambers connected with collector drains laid at a grade of 0.6% were used to measure the drain water discharge, observation wells installed midway between lateral pipes drains were used for measuring the depth to groundwater level. Hydraulic properties of soil, depth to water level, discharge collected in drain pipe were used as evaluation parameters. This study revealed that soil hydraulic conductivity had been increased to 30%, pH, EC and ESP has been reduced to 12, 54 and 20%, respectively. The system has performed well to alleviate the waterlogged condition in 7.5 m lateral drain spacing and 80 cm drain depth treatment by observing the higher rate of decrease in depth to water of 0.3 to 0.4 m and a drainage coefficient of 0.069 to 0.29 cm/day.

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"Water Balance and Climatic Classification of the Cauvery River Basin, India." International Journal of Science and Research (IJSR) 5, no. 5 (May 5, 2015): 1061–71. http://dx.doi.org/10.21275/v5i5.nov163535.

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Keerthan, Lingaiah, Ramesh RamyaPriya, and Lakshmanan Elango. "Geogenic and anthropogenic contamination in river water and groundwater of the lower Cauvery Basin, India." Frontiers in Environmental Science 11 (March 28, 2023). http://dx.doi.org/10.3389/fenvs.2023.1001052.

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Degradation of water quality is a major challenge in both developed and developing countries since it poses a great risk to ecological health. The Cauvery river is one of the most important rivers of southern India, where the effect of seasonal variation on the quality of river water and its adjoining groundwater on the lower part of the basin has not yet been studied. Hence, the present study was carried out to evaluate the river water and adjacent groundwater for drinking and irrigational purposes, and also to identify the sources affecting the water quality. About 118 river water and 131 groundwater samples were collected over 4 months from May 2018 to August 2019. The water samples were analyzed for electrical conductivity (EC), pH, major and minor ions, and trace elements. The major, minor, and trace elements were then compared with the Bureau of Indian Standards and World Health Organization for drinking water quality assessment. The drinking water quality was assessed, indicating that both river water and groundwater were unsuitable in the coastal regions, especially during dry seasons. Irrigation water quality was also assessed, which indicates that most of the river water and groundwater samples were unsuitable near the coastal region. The quality of river water and groundwater in the lower Cauvery Basin was found to be better during wet periods compared to the dry season. It was observed that the rock–water interactions was the major factor controlling the water quality for groundwater and surface water, followed by anthropogenic activities such as disposal of domestic sewage and effluents into the river, as runoff from irrigated lands. The study emphasizes the development of a finer observational network for water quality, along with stringent monitoring of the disposal of contaminants in the rivers and groundwater.

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B.C., Ashwini. "Are Crops Still Profitable in Cauvery River Basin of Karnataka?" Economic Affairs 63, no. 4 (December 20, 2018). http://dx.doi.org/10.30954/0424-2513.4.2018.3.

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Pownkumar, V., P. S. Ananthan, A. Ekka, Neha W. Qureshi, and Velumani T. "Fisheries as ecosystem services: A case study of the Cauvery river basin, India." Frontiers in Environmental Science 10 (September 23, 2022). http://dx.doi.org/10.3389/fenvs.2022.892012.

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Habitat alterations and fragmentation caused by anthropogenic modifications of the riverine landscape have affected fish biodiversity by reducing the number of fish species. Fish are a major element of the aquatic environment, and they play an important role in maintaining ecosystem resilience. However, an incomplete understanding of links between river ecosystem functions and processes with fisheries is one of the major reasons for the alarming rate of decline of fish species. Recognizing the ecosystem services generated by fish populations is essential and is one step toward comprehensive, ecosystem-based management of riverine fisheries. Therefore, this paper is motivated by the need to explore the dimensions of fisheries as an ecosystem service. The data was collected from primary field observations and checklist-based key informant interviews at the seventeen fishing sites selected across an 800 km river stretch of the river. In addition, two focused group discussions with fishers at two sampling sites were held to provide first-hand knowledge of ecosystem services generated by fisheries. At first, the role of fisheries in generating ecosystem services for riverine ecosystem functioning and human demands is outlined using the Millennium Ecosystem Assessment approach. Then, the findings of a survey carried out from the headwaters to the delta of the Cauvery river are presented detailing the fisheries provisioning services, livelihoods, and other ecosystem services. The findings showed that the provisioning and cultural services are highly represented among the four categories of ecosystem services identified by the Millennium Ecosystem Assessment. However, in the literature reviewed, supporting, and regulating services are not well-represented. Based on these findings, the applicability of the ecosystem service concept can be elaborated to inform researchers and policymakers to enhance conservation efforts for fisheries.

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Arulbalaji, P., K. Sreelash, K. Maya, and D. Padmalal. "Hydrological assessment of groundwater potential zones of Cauvery River Basin, India: a geospatial approach." Environmental Earth Sciences 78, no. 24 (November 24, 2019). http://dx.doi.org/10.1007/s12665-019-8673-6.

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Rao, B. S. Prakasa, S. V. J. S. S. Rajesh, and K. Niranjan. "Inter-Basin Water Transfer Impact Assessment on Environment of Pennar to Cauvery Link Canal." IRA-International Journal of Technology & Engineering (ISSN 2455-4480) 3, no. 3 (July 5, 2016). http://dx.doi.org/10.21013/jte.v3.n3.p8.

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<div><p><em>Owing to its striking differences in its climatic conditions, India is frequently facing with extremities such as heavy rain fall in some regions where as some other regions endure little rainfall. The regions receiving heavy precipitation are facing floods resulting in huge amount of water runs into the sea. Contrarily, the regions, without adequate rainfall are suffering from persistent droughts. To overcome such disparities in the distribution of water, National Water Development Agency (NWDA) put a proposal to transfer water through link canals between rivers. The current study is limited to two river basins, Pennar and Cauvery. The present study is confined to Pennar (somasila) to Cauvery (Grand Anicut) whose length is 483 km. The study consist of10 km. buffer on either side of the canal and it occupies 17,215.68 sq. km. out of these 10,105.96 sq.km.is proposed command area which falls in Chittoor, Chengalpattu, North Arcott and South Arcott districts. </em></p><p><em> Using IRS-P6, LISS-III data the characteristics of the rocks, lineaments, drainage, settlements and land use/land cover are mapped for better analysis and the environmental impact. The study indicated that Current fallow land of 5340.14 km<sup>2</sup> and 6307.98 km<sup>2</sup> of cropland will be brought under cultivation which is more than what is NWDA estimated land that will be benefited. The canal will provide water for irrigation and drinking to 4597 villages and 244 villages to be rehabilitated. 119 culverts/canal bridges and 24 aqueducts have to be constructed across the canal.</em></p></div>

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"Estimation of U, 226Ra, 210Po concentration in Cauvery river basin, south interior Karnataka Region, India." Journal of Environmental Science, Computer Science and Engineering & Technology 6, no. 3 (2017). http://dx.doi.org/10.24214/jecet.a.6.3.24356.

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Loganathan, Parthiban, and Amit Baburao Mahindrakar. "Statistical downscaling using principal component regression for climate change impact assessment at the Cauvery river basin." Journal of Water and Climate Change, March 12, 2021. http://dx.doi.org/10.2166/wcc.2021.223.

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Abstract Climate change impact studies are generally carried out with higher resolution general circulation model (GCM) outputs, which are usually for a global scale, and it is difficult to use the same for a regional scale. GCM simulations require downscaling to get a coarser scale output for local climate impact studies. In this study, an improvised principal component regression (PCR) downscaling technique is adapted to downscale 26 Coupled Model Intercomparison Project Phase 5 (CMIP5) GCM historical outputs. A massive river basin named Cauvery with 35 observation stations is categorized into three subbasins to study the regional climate impacts. In this case, the PCR model performed remarkably well compared to other conventional machine learning models with half the computational time than usual. The test statistics state that the validation of the proposed model illustrates a variance in calibration results of the PCR model, which ranges between 2 and 5%, and a variance in validation, which is less than 7% throughout the study area. Since it is desired to prioritize GCMs to choose the merely suitable models for a strategic climate study, the models were selected based on the PCR model performance. Furthermore, CCSM4, inmcm4, and EC-EARTH model's performance in recreating precipitation statistics over the study area are exceptional.

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