Approaches to the artificial impoundment and theoretical design of sedimentation retention basin are reviewed with particular attention to best management practice(BMP) to control agriculture and surface runoff. Sedim...Approaches to the artificial impoundment and theoretical design of sedimentation retention basin are reviewed with particular attention to best management practice(BMP) to control agriculture and surface runoff. Sediments retention basins are the small version of farm pond used where a criteria of farm pond is not met. Such basin traps the pollutants and suspended solids prior to entry into streams and lakes. The study is focused with special reference to the assessment and control of non point source pollution(NPSP) from the sub basin area of Tai Lake in the Xishan County of Wuxi City of China. The author suggested two different approaches to conduct this study including theoretical design for sedimentation retention basin and computation of flow, sediment transport and deposition during the artificial impoundment of retention basin for BMP's utilization. Theoretical design will provide a useful function as a first line defense against the movement of sediments and transport of pollutants into the Tai Lake while the assessment of sediments deposition will help to make its proper use and periodic cleanup.展开更多
Remote sensing techniques and geographic information systems offer a good means of collecting and manipulating the data required to assess conservation practices. A method for automatic generation of most of the data ...Remote sensing techniques and geographic information systems offer a good means of collecting and manipulating the data required to assess conservation practices. A method for automatic generation of most of the data required by the agricultural non point source (AGNPS) erosion model is put forward from three sources: (1) files with contour lines from topographic maps, (2) soil mapping units from soil surveys, and (3) land cover from land sat TM image classifications.展开更多
文摘Approaches to the artificial impoundment and theoretical design of sedimentation retention basin are reviewed with particular attention to best management practice(BMP) to control agriculture and surface runoff. Sediments retention basins are the small version of farm pond used where a criteria of farm pond is not met. Such basin traps the pollutants and suspended solids prior to entry into streams and lakes. The study is focused with special reference to the assessment and control of non point source pollution(NPSP) from the sub basin area of Tai Lake in the Xishan County of Wuxi City of China. The author suggested two different approaches to conduct this study including theoretical design for sedimentation retention basin and computation of flow, sediment transport and deposition during the artificial impoundment of retention basin for BMP's utilization. Theoretical design will provide a useful function as a first line defense against the movement of sediments and transport of pollutants into the Tai Lake while the assessment of sediments deposition will help to make its proper use and periodic cleanup.
基金SupportedbytheScienceandTechnologyCommitteeofSichuanProvince (No .0 1SG47 0 2 )
文摘Remote sensing techniques and geographic information systems offer a good means of collecting and manipulating the data required to assess conservation practices. A method for automatic generation of most of the data required by the agricultural non point source (AGNPS) erosion model is put forward from three sources: (1) files with contour lines from topographic maps, (2) soil mapping units from soil surveys, and (3) land cover from land sat TM image classifications.
