04555nam a2200445 a 4500 20260818132152.0 .b11417523 AIT Thesis no. NR-94-11 Giri, Mahitosh GIS-based evaluation of agricultural nonpoint source pollution : a case study of Telia watershed, Orissa, India Bangkok : Asian Institute of Technology, 1994 123 leaves Thesis ; no. NR-94-11 A thesis submitted in partial fulfillment of the requirements for the degree of Mast e r of Science, School of Environment, Resources and Development Thesis (M.Sc.) - Asian Institute of Technology, 1994 In ancient time agriculture was thought of as protector of nature, that is to say Green, but now a days excessive agriculture, with the use of fatal pesticides and fertilizer to meet the huge demand of food supply, it pollute t he nature instead of protecting it . Nonpoint agricultural pollution are t he diffuse type of pollutant that follows a tortious path from t he soil to water . During the course of movement partial deposition takes place, so its concentration in contributing pollution to the waterbody is not constant. The nonpoint sources pollution generated due to the agricultural activities, are sedimentation, nutrient losses due to excessive fertilizer application, and from feed lot operation etc. Water pollution caused by nonpoint sources are very difficult to assess and control. The study is an attempt to identify the area contributing nonpoint source agricultural pollution and to zone the watershed according to their severity. Zoning critical area contributing nonpoint source pollution is the primary tool for planning and controlling pollution. Zoning is assessed by integrating AGNPS Model (Agricultural Nonpoint Source Pollution Model ) with GIS technology. The whole watershed is divided into the grid cells and the Agnps model is used to determine the approximate sediment, nitrogen and phosphorus input from the various cells of the watershed to the Telia river and to identify t he critical area. An approach is made to compare the cost effectiveness of the two alternatives with the existing one . The study shows t hat the conservation tillage practice is efficient in reducing soil loss but it increase the nutrient yield . It also required high investment and gives less return . The conventional tillage practice with strip cropping reduce the nutrient loss by incorporating the nutrient into the deep soil but results high soil loss. The study also demonstrate that the steep sloped and loamy soil are major source of sediment yield. The present landuse pattern has to be changed in order to control further degradation of soil as well as water quality. The study also exhibit potential use of hydrological NPS modeling and GIS technology for creating a data base that is useful for nonpoint sources pollution control planning and determining the strength of BMP to control NPS pollution . Nonpoint source pollution India Orissa Geographic information systems Saeed, Khalid, Chairperson Sheng, Liang, Co-Chairperson Murty, V.V.N., Examination Committee Government of Sweden, Scholarship donor Asian Institute of Technology. Thesis; no.NR-94-11 Full-Text http://203.159.5.9/ait-thesis/detail.php?q=B16995 .b11417523 mnait s 241218 2 951104 m a s 0 mnait mnait mnarc mnarc 20 40 Barcode : 30050003077764 CREATED : 1995-04-11 RECORD # : i11663510 LPATRON : 0 LCHKIN : - # RENEWALS : 0 # OVERDUE : 0 IUSE3 : 0 TOT CHKOUT : 0 TOT RENEW : 0 Barcode : 30050120658264 CREATED : 1995-04-11 RECORD # : i11663522 LPATRON : 1017815 LCHKIN : 2006-11-09 # RENEWALS : 0 # OVERDUE : 0 IUSE3 : 0 TOT CHKOUT : 15 TOT RENEW : 10 Barcode : 30050160027230 CREATED : 2016-03-18 RECORD # : i12895805 LPATRON : 0 LCHKIN : - # RENEWALS : 0 # OVERDUE : 0 IUSE3 : 0 TOT CHKOUT : 0 TOT RENEW : 0 Barcode : 30050211014047 CREATED : 2022-02-23 RECORD # : i13369891 LPATRON : 0 LCHKIN : - # RENEWALS : 0 # OVERDUE : 0 IUSE3 : 0 TOT CHKOUT : 0 TOT RENEW : 0 50655 50655 0 0 0 0 MAIN MAIN mnait 2026-08-18 0 AIT Thesis no. NR-94-11 30050003077764 2026-08-18 13:21:52 1 2026-08-18 20 0 0 0 0 MAIN MAIN mnait 2026-08-18 0 AIT Thesis no. NR-94-11 30050120658264 2026-08-18 13:21:52 2 2026-08-18 20 0 0 0 0 MAIN MAIN mnarc 2026-08-18 0 AIT Thesis no. NR-94-11 30050160027230 2026-08-18 13:21:52 1 2026-08-18 40 0 0 0 0 MAIN MAIN mnarc 2026-08-18 50.00 0 AIT Thesis no. NR-94-11 30050211014047 2026-08-18 13:21:52 3 2026-08-18 20