03938nas a2200433 a 4500 20260817163642.0 200217s2017 th 000 eng d .b12303884 AIT Thesis no.RS-17-12 Ghafori, Sowaida Assessment of soil erosion and sediment yield using a SWAT model and remote sensing data in the Kharokh watershed in the lower Harirod River Basin, Afghanistan Pathum Thani, Thailand : Asian Institute of Technology, 2017 1 online resource Thesis; no. RS-17-12 A thesis submitted in partial fulfillment of the requirements for the degree of Master of Engineering in Remote Sensing and Geographic Information System Thesis (M.Eng.) - Asian Institute of Technology, 2017 Assessment of soil erosion and sediment transport, environmentally and economically is a significant issue in the Karokh watershed. Soil degradation is causedbyflooding, scarce vegetation cover, and steep gradient land, and socioeconomic constraint has negative impact on human life and environment in this basin. In order to decrease soil erosion rate and sustain soil productivity, it is needed to quantify the magnitude and extent of soil erosion in a spatial domain. Therefore, current study as a first of its kind in the Karokh watershed aims to estimate sediment yield using Soil and Water Assessment Tool(SWAT)model and remote sensing data from year 2008 to 2013 and identify critical areas in the basin due to soil erosion. Landcover map as an important input to SWAT model was prepared based onLandsat7image. The image classification was done for year 2013 using supervised classification method. The hydrologic model of watershed by SWAT executed for six years. The SWAT Calibration and Uncertainty Procedures(SWAT-CAP) tool combined with Sequential Uncertainty Fitting (SUFI-2)method was used to calibrate and validate hydrologic model in the Karokh watershed. After a calibration the SWAT simulation resulted in25.58 ton/ha/year as an average among the basin that ranged from 0.05ton/ha/year to84.2ton/ha/year depending sub basin properties. The result was used for assessing critical sediment source areas in five classes. The severest subbasins with 28% area ratio located in upstream of watershed with high precipitation and steep slope with less vegetation cover and generated 36% of total sediment yield from whole watershed. In summary, the results demonstrated that SWAT model is an appropriate tool for simulating runoff and sediment yield for the basins of Karokh watershed. Soil erosion Afghanistan Sediment transport Afghanistan Remote sensing Afghanistan Miyazaki, Hiroyuki, Chairperson Nagai, Masahiko, Examination Committee Shrestha, Sangam, Examination Committee Ochi, Shiro, Examination Committee AFG Western Basins Water Resources Management Project, Scholarship Donor AIT Fellowship, Scholarship Donor Asian Institute of Technology. Thesis; no. RS-17-12 Full-Text http://203.159.5.9/ait-thesis/detail.php?q=B04645 .b12303884 mnait m 240423 0 200217 m a m 0 mnarc mnarc 40 61 Barcode : 30050120881031 CREATED : 2019-03-04 RECORD # : i13170612 LPATRON : 0 LCHKIN : - # RENEWALS : 0 # OVERDUE : 0 IUSE3 : 0 TOT CHKOUT : 0 TOT RENEW : 0 Barcode : - CREATED : 2019-03-04 RECORD # : i13170624 LPATRON : 0 LCHKIN : - # RENEWALS : 0 # OVERDUE : 0 IUSE3 : 0 TOT CHKOUT : 0 TOT RENEW : 0 9353 9353 0 0 0 0 MAIN MAIN mnarc 2026-08-17 0 AIT Thesis no.RS-17-12 30050120881031 2026-08-17 16:36:42 2026-08-17 40 0 0 0 0 MAIN MAIN mnarc 2026-08-17 0 AIT Thesis no.RS-17-12 2026-08-17 16:36:42 2026-08-17 61