Relevant bibliographies by topics / Paddy's river

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Academic literature on the topic 'Paddy's river'

Author: Grafiati
Published: 4 June 2021
Last updated: 1 February 2022

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Journal articles on the topic "Paddy's river"

1

Sagehashi, Masaki, Hiroko Mori, Yuta Hareyama, Kazuyuki Sakuma, Michihiro Akiba, and Masaaki Hosomi. "Integration of the rice paddy water management into a coupled surface-subsurface water flow model in the Sakuragawa River watershed (Japan)." Hydrology Research 47, no. 1 (June 6, 2015): 137–56. http://dx.doi.org/10.2166/nh.2015.162.

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Rice paddy water management was integrated into a distributed three-dimensional surface and subsurface coupling hydrological model of the Sakuragawa River watershed. This watershed is located in the Kanto Plain in Japan and includes the hillside of Mt. Tsukuba. Therefore, this watershed includes both steep mountainous areas and rice paddy-dominated flat land. Thus, water management of rice paddies is important and was calculated separately using a paddy model. The use of groundwater for rice paddy irrigation was considered as well as a water supply from outside of the watershed (Kasumigaura Lake). The model parameters were calibrated and validated with reference to the predictability of river water flow and the groundwater level. Using the calibrated model, three-dimensional streamlines, water travel time distributions, and water balance in some grids were clarified. The developed model will facilitate sustainable water resource management in the watershed.
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Fujii, Shinji, Masao Omura, Shogo Sugahara, Hiroshi Kamiya, and Masumi Yamamuro. "Effect of Herbicides in Paddy Runoff on Seed Germination of Vallisneria asiatica and Ammannia multiflora." Aquatic Science and Technology 5, no. 1 (January 5, 2017): 1. http://dx.doi.org/10.5296/ast.v5i1.10556.

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Although rice production provides stable environments for aquatic plants, the wide use of herbicides is a concern for wild plants inhabiting the surroundings of rice paddies. Because commercial herbicides are typically a cocktail of chemicals, they may pose a threat to wild plants even when the constituent chemicals do not individually have detrimental effects. We sampled water from a rice paddy and a river receiving the paddy drainage immediately after the transplanting period to identify and compare the concentrations of herbicides. We also examined the effect of the sampled water on the germination of two plants: Ammannia multiflora (hygrophyte) and Vallisneria asiatica (submerged). We found that the concentrations of glufosinate in the paddy and river waters were 0.0015 and 0.0013 mg L-1, respectively, and those of pyraclonil were 0.0010 and 0.0009 mg L-1 in the same waters, indicating that these chemicals persist outside the rice paddy. The germination rate of A. multiflora was significantly diminished with exposure to river and paddy water under fluctuating temperature conditions, whereas no difference was observed for V. asiatica. For a comprehensive understanding of the influences of residual herbicides on wetland biodiversity, it is necessary to analyse the effects of herbicides on a wide range of aquatic plants and at various stages of growth.
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Marchesan, Enio, Renato Zanella, Luis Antonio de Avila, Edinalvo Rabaioli Camargo, Sérgio Luiz de Oliveira Machado, and Vera Regina Mussoi Macedo. "Rice herbicide monitoring in two Brazilian rivers during the rice growing season." Scientia Agricola 64, no. 2 (2007): 131–37. http://dx.doi.org/10.1590/s0103-90162007000200005.

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Irrigated rice production can involve environmental contamination with pesticides due to the proximity of the fields to rivers and to management problems. During three years (2000 to 2003) the rice herbicides clomazone, propanil and quinclorac were quantified in water during the rice growing season, in the Vacacaí and Vacacaí-Mirim Rivers, located in Rio Grande do Sul (RS) State, Brazil. Water samples were taken at several locations in each river, selected by their importance in terms of rice drainage area. The samples were analyzed by HPLC-UV. At least one herbicide was detected in 41% of the samples from the Vacacaí River and 33% from the Vacacaí-Mirim River. The most frequent herbicide in both rivers and in each year was clomazone. The amount of herbicides in the river water was dependent on the rainfall regime. River water contamination by rice herbicides is probably caused by the rice water management used in the fields. The maintenance of flooded areas makes herbicides prone to contaminate the environment. To reduce the environmental contamination risk it is necessary to adopt measures to avoid overflow of flooded rice fields, keeping paddy water in the field for time enough to reduce the herbicide concentration before its release and enhancing the quality of the levees to reduce the probability of paddy rice overflow.
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Li, He, Dongjie Fu, Chong Huang, Fenzhen Su, Qingsheng Liu, Gaohuan Liu, and Shangrong Wu. "An Approach to High-Resolution Rice Paddy Mapping Using Time-Series Sentinel-1 SAR Data in the Mun River Basin, Thailand." Remote Sensing 12, no. 23 (December 3, 2020): 3959. http://dx.doi.org/10.3390/rs12233959.

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Timely and accurate regional rice paddy monitoring plays a significant role in maintaining the sustainable rice production, food security, and agricultural development. This study proposes an operational automatic approach to mapping rice paddies using time-series SAR data. The proposed method integrates time-series Sentinel-1 data, auxiliary data of global surface water, and rice phenological characteristics with Google Earth Engine cloud computing platform. A total of 402 Sentinel-1 scenes from 2017 were used for mapping rice paddies extent in the Mun River basin. First, the calculated minimum and maximum values of the backscattering coefficient of permanent water (a classification type within global surface water data) in a year was used as the threshold range for extracting the potential extent. Then, three rice phenological characteristics were extracted based on the time-series curve of each pixel, namely the date of the beginning of the season (DBS), date of maximum backscatter during the peak growing season (DMP), and length of the vegetative stage (LVS). After setting a threshold for each phenological parameter, the final rice paddy extent was identified. Rice paddy map produced in this study was highly accurate and agreed well with field plot data and rice map products from the International Rice Research Institute (IRRI). The results had a total accuracy of 89.52% and an F1 score of 0.91, showing that the spatiotemporal pattern of extracted rice cover was consistent with ground truth samples in the Mun River basin. This approach could be expanded to other rice-growing regions at the national scale, or even the entire Indochina Peninsula and Southeast Asia.
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Matsui, Y., T. Inoue, T. Matsushita, T. Yamada, M. Yamamoto, and Y. Sumigama. "Effect of uncertainties in agricultural working schedules and Monte-Carlo evaluation of the model input in basin-scale runoff model analysis of herbicides." Water Science and Technology 51, no. 3-4 (February 1, 2005): 329–37. http://dx.doi.org/10.2166/wst.2005.0607.

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In the prediction of time-series concentrations of herbicides in river water with diffuse-pollution hydrological models, farming schedules (the dates of herbicide application and drainage of irrigation water from rice paddies) greatly affect the runoff behavior of the herbicides. For large catchments, obtaining precise data on farming schedules is impractical, and so the model input inevitably includes substantial uncertainty. This paper evaluates the effectiveness of using the Monte-Carlo method to generate sets of estimated farming schedules to use as input to a GIS-based basin-scale runoff model to predict the concentrations of paddy-farming herbicides in river water. The effects of using the Monte-Carlo method to compensate for uncertainty in the evaluated parameters for herbicide decomposition and sorption were also evaluated.
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Fujii, S., H. Tanaka, and I. Somiya. "Quantitative comparison of forests and other areas with dry weather input loading in the Lake Biwa catchment area." Water Science and Technology 45, no. 9 (May 1, 2002): 183–93. http://dx.doi.org/10.2166/wst.2002.0235.

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For the evaluation of pollutants loading to Lake Biwa, comprehensive river surveys on river mouths and forest sites were conducted 9 times from 1996 to 1999, on 25–40 main rivers in the Lake Biwa watershed. The main results obtained are as follows. (1) River water quality reflects regional characteristics of their catchment areas, and the concentration difference among rivers ranged between 2–3 fold. (2) Concentration variation shows different patterns with time and location depending on water quality indices used. (3) Indices related to organic matter and nutrients have lower correlation between forests and river mouths, but those related to ionic species showed strong correlation. (4) Flux comparison of forest and river mouth sites suggests that pollutants from catchment areas are conveyed to the lake not only through rivers but also underground. (5) In dry weather conditions, forests contribute 30% to the whole pollutants (TN, TP, and TCODMn) loading, and the remainder is derived mainly from paddy fields and residential/commercial zones. (6) Unit loading factors from forests are estimated as 640, 57 and 1200 kg/km2/y, respectively for TN, TP and TCODMn, while those from other areas are estimated as 2,500, 208 and 4,200 kg/km2/y.
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Kawara, Osami, Katsuya Hirayma, and Takao Kunimatsu. "A study on pollutant loads from the forest and rice paddy fields." Water Science and Technology 33, no. 4-5 (February 1, 1996): 159–65. http://dx.doi.org/10.2166/wst.1996.0500.

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The eutrophication of Lake Biwa, which is the largest lake in Japan and one of the most important fresh water resources, has been warned since 1960s. In order to improve the water quality of the lake, it is inevitable to reduce the pollutant loads from the river basins. The Hino river and the Soma river basins are considered in the present study and models which predict the influence of pollutant load generation on the discharged pollutant loads through the rivers. These basins mainly consist of forests and rice paddy fields. The identified models reproduce the observed water quality relatively well. Evaluation of loads from point-sources and non-point sources indicates that the loads from non-point sources occupy the most of pollutant loads from the basins. Especially, the loads from rice paddy fields occupy most of the pollutant loads from the basisn. Therefore, controlling non-point source pollutant loads in the Hino and Soma river basins is an important step in checking the eutrophication of Lake Biwa.
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Nakajima, J., Y. Murata, and M. Sakamoto. "Comparison of several methods for BAP measurement." Water Science and Technology 53, no. 2 (January 1, 2006): 329–36. http://dx.doi.org/10.2166/wst.2006.067.

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It has been more important for management of water quality to estimate the amount of bioavailable phosphorus (BAP) in suspended solids (SS) entering lakes and estuaries. AGP test or extraction by 0.1 mol l−1 NaOH (C-BOD) is widely used. Recently, highly bioavailable phosphorus (HBAP) was introduced to indicate a more easily soluble and bioavailable fraction using successive extraction by 0.1 mol l−1 HCl and 0.1 mol l−1 NaOH. New biologically measured BAP (B-BAP) using bacterial respiration activity was introduced in this paper. B-BAP was estimated from oxygen uptake rate (OUR), which was measured by a respiratory meter for BOD measurement using a pressure sensor. B-BAP is useful for a rapid and direct measurement of phosphorus bioavailability. B-BAP, HBAP and C-BAP in river SS were measured and compared with each other. The percentages of HBAP and B-BAP to PP were large in the urban river, while the percentage of NaOH-P or C-BAP was large in the rivers flowing in agricultural areas. By comparison with phosphorus fractions in paddy soil and activated sludge it was suggested that SS in the rivers flowing in agricultural areas mainly consisted of clay, silt or sand, while the SS in the urban river consisted of a large percentage of organic particles as well. Phosphorus in SS was suggested to be more easily bioavailable in the urban river than the rivers in agricultural areas. The ratio of C-BAP/B-BAP was large in the rivers in agricultural areas and small in the urban river. As HBAP contents were almost similar to B-BAP contents in the river SS, HBAP can be a suitable index of phosphorus indicating easily and rapidly the bioavailable fraction in SS. Keywords Bacterial respiration; bioavailable phosphorus; eutrophication; lake water management; oxygen uptake rate; phosphate analysis
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Rau Alexey,, Kadasheva Zhanar,, Rau Genadiy,, Anuarbekov Kanat,, and Meranzova Rossitza,. "GEOLOGICAL STRUCTURE OF SOILS AND RICE YIELD IN THE ILI RIVER BASIN." NEWS of National Academy of Sciences of the Republic of Kazakhstan 5, no. 443 (October 15, 2020): 165–71. http://dx.doi.org/10.32014/2020.2518-170x.117.

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Rice irrigation systems in Kazakhstan are located on river terraces and levees of the Syr Darya, Ile, and Karatal rivers’ basins. The geological structure and lithological composition of soils in the aeration zone is characterized by a wide variety, differing in soil fertility, mechanical composition, water and physical properties, water availability and salinity. Alluvial-meadow and takyr soils consist of light and heavy loam, sandy loam, and clay [1,2,3]. Melioration errors of the rice irrigation systems, built in the period from 60s to 80s of the last century, can be described by the fact that the Kubanskaya rice sowing map was built on all soils of river terraces and river banks, with the same parameters of irrigation and drainage, with the share of rice 57.5% and 63% [4]. At the rice irrigation systems, where the geological structure and lithological composition of the aeration zone soils correspond to the irrigation and drainage parameters of the Kubanskaya rice sowing map, the soil fertility and ameliorative status of irrigated land has remained high for many decades. The salt content in the 100 cm soil layer is 0.3-0.4%; in the autumn-winter period ground water is at a depth of 2.0-2.5 m, its mineralization is 5-7 g/l. During the rice irrigation period, ground water does not connect with the water of rice paddies, and the filtration of water from rice paddies is permitted and comprises 12 – 17 mm/day. Rice is grown without flow and discharge of water from rice paddies, the irrigation rate is 21,400 m3/ha, and the yield is 5.2 t/ha. At the rice irrigation systems, where the geological structure and lithological composition of the soil in the aeration zone does not correspond to the irrigation and drainage parameters of the Kubanskaya rice sowing map, the land is saline. During the rice irrigation period, the ground water connects with the water on the rice paddies. On these paddies, due to the convective diffusion of salts from the soil and from ground water, water salinity increases and reaches the critical threshold of toxicity of 2.5 g/l [5]. It is necessary to discharge water to reduce the salinity of water on the rice paddies, which is followed by flooding of water from the irrigation channel. The irrigation rate is 23,500 m3/ha, and the yield is 4.7 t/ha.
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Oda, Masato, and Huu Chiem Nguyen. "Methane emissions in triple rice cropping: patterns and a method for reduction." F1000Research 8 (February 15, 2021): 1675. http://dx.doi.org/10.12688/f1000research.20046.6.

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The Mekong Delta paddies are known as hotspots of methane emission, but these emissions are not well studied. We analyzed methane emission patterns based on monitoring data from typical triple rice cropping paddies collected over 5 years. We found that the total emissions in a crop season doubled in the second crop, tripled in the third crop, and reset after the annual natural flood of the Mekong River. The emission peaks occurred around 0 to 3 weeks after starting irrigation, then gradually decreased. In general, the main source of emitted methane is rice-derived carbon by current-season photosynthates and the emission peaks at the rice heading stage. However, the contribution of the rice-derived carbon is negligible in the hotspot paddies because total emission is high. The increase in emission levels from the first to the third crop can be explained by the accumulation of rice residue from the preceding crops, especially rice straw incorporated into the soil. The reset of emission levels after the annual flood means that the rice straw is decomposed without methanogenesis in water with dissolved oxygen. Thus, the annual emission pattern shows that avoiding rice straw incorporating into soil and decomposing rice straw in paddy surface-water reduces methane emissions.
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Dissertations / Theses on the topic "Paddy's river"

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Eldridge, Simon Michael, and n/a. "The impact of the scale of mapping on soil map quality." University of Canberra. Resource, Environmental & Heritage Sciences, 1997. http://erl.canberra.edu.au./public/adt-AUC20060707.102807.

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It is generally assumed that increased map precision (ie map unit homogeneity) and map purity (map unit accuracy) should result from increasing the scale of mapping of the soil resource, since it should enable a more intricate breakdown of the landscape into landform facet based units. This study compared the predictive success of a 1:1 OK scale soil association map with the 1:25K and 1:1OOK scale soil landscape maps within the Birrigai area of the Paddy's river catchment, south west of Canberra, A.C.T. The 1:25K and the 1:100K scale soil landscape maps were also evaluated in a second larger evaluation area in the Paddy's river catchment which allowed more of the larger soil landscape map units to be evaluated. The 1:25K scale soil map was produced by another author for the A.C.T Government, and was surveyed at a substantially lower survey intensity than that for the 1:100K and 1:10K scale soil maps (ie only 0.05 observation sites / cm2 of published map). These maps were evaluated using a set of randomly located independent evaluation sites in each evaluation area, and from these calculating and comparing standard Marsman & de Gruijter(1986) measures of Map Purity. The strength of soil-landscape relationships within this catchment were determined from a Fixed One Way Analysis of Variance, and from more simplistic graphical comparisons of the means and standard deviations of the discrete soil data within these landform based map units. Soil-landscape relationships for the Nominal scale soil data (ie class type data) were evaluated by comparing the Marsman & de Gruijter(1986) Homogeneity index ratings among the soil map units. Intensive survey traverses were also carried out in selected soil landscapes to further evaluate the strength of soil landscapes present. The results revealed obvious improvements in map quality associated with increasing map scale from 1:100,000 to 1:10,000, and these included increases in the predictive success (Map Purity), reductions in the extent of map unit impurities, and planning advantages associated with having individual land facets delineated on the 1:10,000 scale map. The respectable purity ratings achieved by the 1:100,000 scale soil landscape map (ie average purity rating of 63%) was largely attributed to the flexibility of the "soil material" approach to soil landscape mapping. The relatively poor performance of the 1:25K consultancy soil landscape map demonstrated the fact that; any benefit gained from the improved intricacy in the representation of map unit delineation's with increased mapping scale, will be drastically reduced if it is not matched by an associated increase in the intensity of field investigations. Evaluations of the soil-landscape relationships found that the land facets of the Paddy's river catchment generally failed to delineate areas that were both uniform and unique in respect of their soil properties. Soil-landscape relationships were instead found to be quite complex, applying to only certain land facets, and in regards to only certain soil properties. Soil maps with units based on landsurface features were recommended on the basis of the importance of other landscape factors other than soils to land capability ratings, as well as on the useability of such maps. This study recommended the adoption of a " >2 detailed soil profile observations / land facet in each map unit " mapping standard to ensure a reasonable estimate of the variability and modal soil conditions present, as well as a reliable confirmation of the perceived soil-landscape relationships. The error usually associated with small scale mapping was effectively reduced by rapid ground truthing, involving driving along the major roads dissecting the map area and making brief observations of soil exposures on road batters, despite the bias of the road network making such mapping improvements uneven across the map. The major point to come from this study was the re-emphasising of the point that soil spatial variability has to be accepted as a "real landscape attribute" which needs to be accurately described and communicated to land users, and must not be considered as some sort of soil mapping failure. The fact that individual facets of the landscape rarely coincide with unique pockets of uniform and unique soils and soil properties must be considered simply an on the ground reality of nature, and not some mapping failure. It was thought that since other landscape factors (eg hillslope gradient) most often dominate the determination of land use suitability and capability, it is better to effectively describe the range and modal state of the soil conditions within such facets, then to attempt to extrapolate possible soil boundaries using geostatistical techniques which cut across such land facets, and may or may not correlate with real groupings of soil properties, depending on the spatial resolution of the soil variability distribution in the landscape. Even so the results of this investigation do put the validity of the physiographic terrain class mapping model as a predictor of soil traits under question, at least for the more complex landscape settings.
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Iwasaki, Yumi. "Assessment of groundwater environment in a paddy-dominated alluvial fan- Case study of Tedori River alluvial fan, Japan -." Kyoto University, 2014. http://hdl.handle.net/2433/189682.

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Kyoto University (京都大学)
0048
新制・課程博士
博士(農学)
甲第18525号
農博第2082号
新制||農||1026(附属図書館)
学位論文||H26||N4869(農学部図書室)
31411
京都大学大学院農学研究科地域環境科学専攻
(主査)教授 川島 茂人, 教授 星野 敏, 教授 藤原 正幸
学位規則第4条第1項該当
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Yocum, Daniel A. "Iron oolited from the cretaceous interor seaway Albian Paddy Member of the Peace River Formation, Alberta, Canada, and Campanian Castlegate Formation, Colorado, USA /." 1996. http://catalog.hathitrust.org/api/volumes/oclc/37183706.html.

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Thesis (M.S.)--University of Wisconsin--Madison, 1996.
Typescript. eContent provider-neutral record in process. Description based on print version record. Includes bibliographical references (leaves 70-74).
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Books on the topic "Paddy's river"

1

Taylor, Carl T. Paddles on the Yukon: 1,800 miles in a canoe on the wildest river in North America. Clifton Forge, Va: Mountain Empire Publications, 1998.

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2

Commission, Mekong River. Programme to demonstrate multi-functionality of paddy fields over the Mekong River Basin (DMPF): Final report 2002/2007. [Vientiane]: Mekong River Commission, 2008.

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Commission, Mekong River. Programme to demonstrate multi-functionality of paddy fields over the Mekong River Basin (DMPF): Completion report 2002/2010. [Vientiane]: Mekong River Commission, 2010.

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Down the Mississippi: A Sixty-Five Year Old Paddles a Canoe the Length of the Great River to Rediscover Himself. Bonus Books, 1992.

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Book chapters on the topic "Paddy's river"

1

Nakagiri, Takao, Hisaaki Kato, Seiji Maruyama, and Satoko Hashimoto. "Hydrogeochemical Assessment of the Contribution of Caldera Lakes and Paddy Irrigation to River Water Stability." In Sustainable Water Management, 81–95. Singapore: Springer Singapore, 2016. http://dx.doi.org/10.1007/978-981-10-1204-4_6.

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Ferreira, D., M. Simões, F. Pessoa, F. Reboredo, A. Almeida, and F. Lidon. "Impacts of Irrigated Cultures (Paddy-Rice) in Groundwater Quality in Tejo Alluvial River Basin, Portugal." In Advances in Geoethics and Groundwater Management : Theory and Practice for a Sustainable Development, 263–66. Cham: Springer International Publishing, 2021. http://dx.doi.org/10.1007/978-3-030-59320-9_53.

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Ishihara, S., T. Horio, Y. Kobara, S. Endo, K. Ohtsu, M. Ishizaka, Y. Ishii, and M. Ueji. "Concentrations of Herbicides Used in Rice Paddy Fields in River Water and Impact on Algal Production." In ACS Symposium Series, 112–23. Washington, DC: American Chemical Society, 2005. http://dx.doi.org/10.1021/bk-2005-0899.ch011.

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Chakraborty, Paromita, Sanjenbam Nirmala Khuman, Bhupander Kumar, and Daniel Snow. "Sources of Organochlorine Pesticidal Residues in the Paddy Fields Along the Ganga-Brahmaputra River Basin: Implications for Long-Range Atmospheric Transport." In Soil Biology, 69–83. Cham: Springer International Publishing, 2018. http://dx.doi.org/10.1007/978-3-319-93671-0_4.

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Zhang, Yuanyuan, Shuangxi Fang, Junfeng Liu, and Yujing Mu. "Exchange Fluxes of NOX, NH3, and N2O from Typical Wheat, Paddy, and Maize Fields in the Yangtze River Delta and North China Plain." In ACS Symposium Series, 51–65. Washington, DC: American Chemical Society, 2011. http://dx.doi.org/10.1021/bk-2011-1072.ch004.

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Zaman, M., K. Kleineidam, L. Bakken, J. Berendt, C. Bracken, K. Butterbach-Bahl, Z. Cai, et al. "Methodology for Measuring Greenhouse Gas Emissions from Agricultural Soils Using Non-isotopic Techniques." In Measuring Emission of Agricultural Greenhouse Gases and Developing Mitigation Options using Nuclear and Related Techniques, 11–108. Cham: Springer International Publishing, 2021. http://dx.doi.org/10.1007/978-3-030-55396-8_2.

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AbstractSeveral approaches exist for measuring greenhouse gases (GHGs), mainly CO2, N2O, and CH4, from soil surfaces. The principle methods that are used to measure GHG from agricultural sites are chamber-based techniques. Both open and closed chamber techniques are in use; however, the majority of field applications use closed chambers. The advantages and disadvantages of different chamber techniques and the principal steps of operation are described. An important part of determining the quality of the flux measurements is the storage and the transportation of the gas samples from the field to the laboratory where the analyses are carried out. Traditionally, analyses of GHGs are carried out via gas chromatographs (GCs). In recent years, optical analysers are becoming increasingly available; these are user-friendly machines and they provide a cost-effective alternative to GCs. Another technique which is still under development, but provides a potentially superior method, is Raman spectroscopy. Not only the GHGs, but also N2, can potentially be analysed if the precision of these techniques is increased in future development. An important part of this chapter deals with the analyses of the gas concentrations, the calculation of fluxes, and the required safety measures. Since non-upland agricultural lands (i.e. flooded paddy soils) are steadily increasing, a section is devoted to the specificities of GHG measurements in these ecosystems. Specialised techniques are also required for GHG measurements in aquatic systems (i.e. rivers), which are often affected by the transfer of nutrients from agricultural fields and therefore are an important indirect source of emission of GHGs. A simple, robust, and more precise methodof ammonia (NH3) emission measurement is also described.
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Stevenson, Robert Louis. "Chapter III The Missionary." In South Sea Tales. Oxford University Press, 2008. http://dx.doi.org/10.1093/owc/9780199536085.003.0005.

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As I came out on the verandah, the mission boat was shooting for the mouth of the river. She was a long whale-boat painted white; a bit of an awning astern; a native pastor crouched on the wedge of the poop, steering; some four-and-twenty paddles...
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Chaudhuri, Subhamita, Punarbasu Chaudhuri, and Raktima Ghosh. "The Impact of Embankments on the Geomorphic and Ecological Evolution of the Deltaic Landscape of the Indo-Bangladesh Sundarbans." In River Deltas - Recent Advances [Working Title]. IntechOpen, 2020. http://dx.doi.org/10.5772/intechopen.94163.

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The deltaic landscape of the Ganga-Brahmaputra delta has evolved through a complex interplay of geomorphic processes and tidal dynamics coupled with the anthropogenic modifications brought over in course of the reclamation of the islands since the late 18th century. The reclamation process was characterized by clearing lands for paddy farms and fish ponds by building a mesh of earthen embankments along creek banks to restrict saltwater intrusion. The length of the embankments in the Indian Sundarbans alone is 3638 km (World Bank, 2014) which altered the tidal inundation regimes, sediment accretion and geomorphic character of the deltaic inlets. The mean annual sedimentation rate (2.3 cm y−1) in the central Ganga-Brahmaputra delta is over two times higher than sedimentation within the natural intertidal setting of the Sundarbans (Rogers et al., 2017). The tidal range has also increased inland due to polder construc¬tion, with high water levels within the polder zone increasing as much as 1.7 cm y−1 (Pethick and Orford, 2013). Embankments have impacted on the biodiversity and physiological adaptations of mangroves within the sphere of tidal ingression, habitat fragmentation and seedling establishment. The chapter attempts to reappraise the impact of dykes on the geomorphology of the deltaic landscape and on the functionalities of mangrove forests.
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Randy Gimblett, H., and Catherine A. Roberts. "An Intelligent Agent-Based Model for Simulating and Evaluating River Trip Scenarios along the Colorado River in Grand Canyon National Park." In Integrating Geographic Information Systems and Agent-Based Modeling Techniques for Understanding Social and Ecological Processes. Oxford University Press, 2002. http://dx.doi.org/10.1093/oso/9780195143362.003.0017.

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In 1979 the National Park Service (NPS) approved a Colorado River Management Plan (CRMP) based on the Grand Canyon Wilderness Recommendation and findings from a comprehensive research program. An amendment to an Interior Appropriations Bill in 1981 prohibited the implementation of this plan and resulted in increased public use levels and continued motorized use in proposed wilderness. In the last 20 years, the demand for Whitewater experiences has increased, especially for the self-outfitted public. Today, the NPS is challenged by users and preservationists to provide accessibility while maintaining wilderness integrity. Whitewater trips along the Colorado River through the Grand Canyon National Park are an excellent example of how increasing human use is impacting a sensitive, dynamic ecosystem and threatening to degrade the quality of experience for human visitors. Although visitation of the Colorado River has remained relatively constant since the 1989 CRMP—at 20,000 to 22,000 visitors and another 3,700 guides, researchers, and park staff traveling through the Grand Canyon each year—figure 1 shows the rapid rise in visitation since 1955. Visitors travel on over 600 commercial or privately organized river trips on a variety of watercraft powered by oars, paddles, or motors for varying duration. Most of the recreational use is concentrated in the summer months, resulting in high encounter rates and congestion at riverside attraction sites. Commercially guided operations account for over 80% of the total recreational use, of which 85% is on motorized rafts. The remaining proportion of recreational river trips are undertaken by noncommercial, self-outfitted public. Nearly 60% of the self-outfitted trips occur in the summer months, with an even proportion on use in the spring and fall. Less than 1% of these trips are motorized. Major drainages and side canyons along the 277-mile river corridor in Grand Canyon National Park provide recreational activities including white water rapids, sightseeing, hiking, and swimming. Well-known attractions and destinations are regular stops for nearly every river trip that passes through the canyon. Crowding and congestion along the river at attraction sites is often extreme and has been shown to affect the character and quality of visitor experience (e.g., Shelby et a]. ).
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Can Körükçü, Barış, and Cemile Ozcan. "Determination of Concentration for Some Priority Substances in Paddy Fields of Ergene River, Meriç River, and Yenikarpuzlu Dam, Turkey." In Emerging Contaminants [Working Title]. IntechOpen, 2020. http://dx.doi.org/10.5772/intechopen.93383.

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Conference papers on the topic "Paddy's river"

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Chuc, Man Duc, Nguyen Hoang Anh, Nguyen Thanh Thuy, Bui Quang Hung, and Nguyen Thi Nhat Thanh. "Paddy rice mapping in red river delta region using landsat 8 images: Preliminary results." In 2017 9th International Conference on Knowledge and Systems Engineering (KSE). IEEE, 2017. http://dx.doi.org/10.1109/kse.2017.8119460.

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Tang, Hao, Yinsheng Li, Jinghua Su, Shenfa Huang, and Jiangping Qiu. "Notice of Retraction: Nitrogen Loss in Runoff from Paddy Fields in Plain Tidal River Network Region." In 2011 5th International Conference on Bioinformatics and Biomedical Engineering. IEEE, 2011. http://dx.doi.org/10.1109/icbbe.2011.5781207.

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Zhang Zhan-Yu, Chi Yi-Xia, Zhu Cheng-Li, and Liu Jing-Jing. "Suitable Buffer Strip Width along Rivers for Nitrate N Removal from Paddy Field Drainage." In 9th International Drainage Symposium held jointly with CIGR and CSBE/SCGAB Proceedings, 13-16 June 2010, Québec City Convention Centre, Quebec City, Canada. St. Joseph, MI: American Society of Agricultural and Biological Engineers, 2010. http://dx.doi.org/10.13031/2013.32134.

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Li, Jingjing, Zhihao Qin, Wenjuan Li, and Lu Lin. "Evaluating health of paddy rice field ecosystem with remote sensing and GIS in Lower Yangtze River Plain, China." In SPIE Remote Sensing, edited by Christopher M. U. Neale, Manfred Owe, and Guido D'Urso. SPIE, 2008. http://dx.doi.org/10.1117/12.800183.

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Mishima, S. I. "River water qualities and types of agricultural production—a comparison between paddy farming and intensive livestock production areas." In ECOSUD 2007. Southampton, UK: WIT Press, 2007. http://dx.doi.org/10.2495/eco070391.

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Ishikawa, T., and Y. Zhang. "Impact of fine sediment discharge from paddy fields on river water quality: a case study focusing on the rice farming calendar." In WATER POLLUTION 2016. Southampton UK: WIT Press, 2016. http://dx.doi.org/10.2495/wp160021.

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