03511nas|a2200445 i 4500 20260817162854.0 250800s2000 th uu m rtt 00| a1eng d .b11803241 AIT Thesis no.WM-99-17 Ghimire, Sohan Kumar Application of epic model in an agricultural watershed, Jhikhu Khola, Nepal Bangkok : Asian Institute of Technology, 2000 101 leaves Thesis ; no. WM-99-17 A thesis submitted in partial fulfillment of the requirements for the degree of Master of Engineering. Thesis (M.Eng.) - Asian Institute of Technology, 2000 Erosion Productivity Impact Calculator (EPIC) was applied in a rainfed agricultural terraced watershed in Nepal. Performance of EPIC in simulating runoff, soil loss, nutrient loss and crop growth was evaluated. EPIC could predict daily runoff within 35 % of observed values for rainfalls greater than 30 mm. For smaller rainfalls, variations in predicted results were more. There was also wide variation in observed and predicted peak runoffs by more than 50%. Based upon size and intensity, rainfall events were divided into three categories to predict soil losses. Those were small (less than l 5mm), moderate (15 - 30mrn) and high (more than 30 mm). USLE could predict erosion loss from moderate rainfalls within 25 % of observed values. However, for higher rainfall events, USLE underpredicted soil losses. Based upon average annual soil loss from the watershed, the model was calibrated and soil losses were predicted for different scenarios of management practices. For simulation of nutrient loss, information on annual losses of Nitrogen and Phosphorus was taken from a research study carried out in the area. Predictions were made on N and P losses by runoff, and effects of applying organic residues and chemical fertilizer (Urea) on Maize yield. Longterm simulations were carried out for 50 years to assess the effects of erosion on crop productivity. It was found that there would be gradual decline in productivity and relative productivity will reach to 0.90 after 50 years. Soil conservation Simulation methods Watersheds Nepal Jhikhu Khola Loof, Rainer, Chairperson Babel, Mukand Singh, Chairperson Sutat Weesakul, Examination committee Izumi, N., Examination committee DAAD, Scholarship Donor Federal Republic of Germany, Scholarship Donor Asian Institute of Technology. Thesis ; no. WM-99-17 Full-Text http://203.159.5.9/ait-thesis/detail.php?q=B06628 .b11803241 mnait u 240331 0 000825 m a u 0 mnait mnait mnarc 20 40 Barcode : 30050120592851 CREATED : 1999-03-28 RECORD # : i12214188 LPATRON : 1016161 LCHKIN : 2003-07-27 # RENEWALS : 0 # OVERDUE : 0 IUSE3 : 1 TOT CHKOUT : 3 TOT RENEW : 13 Barcode : 30050120592828 CREATED : 1999-03-28 RECORD # : i1221419x LPATRON : 1023458 LCHKIN : 2014-03-21 # RENEWALS : 0 # OVERDUE : 0 IUSE3 : 2 TOT CHKOUT : 8 TOT RENEW : 5 Barcode : 30050160042866 CREATED : 2016-03-22 RECORD # : i12902366 LPATRON : 0 LCHKIN : - # RENEWALS : 0 # OVERDUE : 0 IUSE3 : 0 TOT CHKOUT : 0 TOT RENEW : 0 6578 6578 0 0 0 0 MAIN MAIN mnait 2026-08-17 50.00 0 AIT Thesis no.WM-99-17 30050120592851 2026-08-17 16:28:54 1 2026-08-17 20 0 0 0 0 MAIN MAIN mnait 2026-08-17 50.00 0 AIT Thesis no.WM-99-17 30050120592828 2026-08-17 16:28:54 2 2026-08-17 20 0 0 0 0 MAIN MAIN mnarc 2026-08-17 0 AIT Thesis no.WM-99-17 30050160042866 2026-08-17 16:28:54 2026-08-17 40