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035 _a.b12320973
099 9 _aAIT Thesis no.WM-18-15
100 1 _aTripathee, Nisha
245 1 0 _aClimate change impacts on water resources and cereal yield in Mohana River Basin, Nepal
260 _aPathum Thani, Thailand :
_bAsian Institute of Technology,
_c2018
300 _e1 online resource (69 leaves) :
_bill (some col.)
490 1 _aThesis;
_vno. WM-18-15
502 _aThesis (M.Eng.) - Asian Institute of Technology, 2018
500 _aThe requirements for the degree of Master of Engineeing in Water Engineering and Management
520 _aFuture climate data for temperature and precipitation obtained from climate models were bias corrected using the linear scaling method. Maximum and minimum temperatures and precipitation were projected for three future periods: Near future (2018-2040),MF (2041-2070) and FF (2070-2099)against the baseline period of 1980-2005. The mean annual temperature in the basin is projected to increase by 1.1°C, 2.2°C and 3.2°C in near future, mid future and far futurerespectively. The mean annual precipitation is projected to increaseexcept in mid future under RCP4.5whereas monthly precipitation is expected to increase and decrease according to the months for the whole river basin, under RCP 4.5 and RCP 8.5scenarios, by 2100. Thecalibration of the spatially distributed hydrological models is complex due to the lack of reliable data, uncertainty in representing the physical features of a river catchment, and the implementation of hydrological processes in a simulation model. In this research, calibration of the Soil and Water Assessment Tool (SWAT) model is done by incorporation of remote sensing-MODIS AETand monthly discharge data at sub-basin.The calibration result showed good performance with Nash coefficientof 0.73during calibration period and 0.75during validation with AET. Similarly with monthly discharge in one of the sub-catchment Nashcoefficient is 0.75 for calibration period and 0.84 for validation period.Results show that the annual average precipitation, actual evapotranspiration (ET) and net water yields of the whole basin were 2,010millimeters (mm), 746mm and 1,219mm, respectivelyfor the baseline period. Due to the climate change, the result showed increase in net water yield, with slight decreasing trend in actual evapotranspiration. In addition, high flows in the basin are expected to increase which indicates that flood risk can increase whereas, increase in low flow can be taken as opportunity. So, the ministries and departments should consider the impact accordingly. From the Aqua crop model, it was estimated that cereal yield (rice, wheat and maize) were increasing for all future period. Adaptation strategies {u2013}such as increasing FYM application, and other management practices that will improve soil fertility will be important in enhancement ofcrop production and taking advantage of beneficial changes in climate.
650 0 _aClimatic change
_zNepal
_zMohana River Basin
650 0 _aWater-supply
_zNepal
_zMohana River Basin
650 0 _aCereal
_xYields
_zNepal
_zMohana River Basin
700 1 _aBabel, Mukand Singh,
_eChairperson
700 1 _aShrestha, Sangam,
_eExamination Committee
700 1 _aSoni, Peeyush,
_eExamination Committee
700 1 _aPandey, Vishnu Prasad,
_eExamination Committee
710 2 _aAsian Development Bank-Japan Scholarship Program (ADB-JSP),
_eScholarship Donor
810 2 _aAsian Institute of Technology.
_tThesis;
_vno. WM-18-15
856 _3Full-Text
_uhttp://203.159.5.9/ait-thesis/detail.php?q=B04679
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