Climate change impacts on streamflow,water quality,and best management practices for the Shell and Logan Creek Watersheds in Nebraska,USA

作     者：Michael W.Van Liew Song Feng Tapan B.Pathak 

作者机构：Department of Biological Systems EngineeringUniversity of Nebraska-LincolnNEUSA School of Natural ResourcesUniversity of Nebraska-LincolnNEUSA 

出 版 物：《International Journal of Agricultural and Biological Engineering》 (国际农业与生物工程学报（英文）)

年 卷 期：2012年第5卷第1期

页      面：13-34页

学科分类：08[工学] 081501[工学-水文学及水资源] 0815[工学-水利工程] 

基　　金：Song Feng is partly supported by multi-state project NC1179 

主　　题：hydrology water quality model calibration climate change SWAT 

摘      要：Improvements in the management of water,sediment,and nutrients under future climatic conditions are needed to ensure increased crop and livestock production to meet greater global needs and the future availability of water for competing demands and protection against adverse water quality *** study determined the impacts of future climate change scenarios on streamflow,water quality,and best management practices(BMPs)for two watersheds in Nebraska,*** Soil and Water Assessment Tool(SWAT)was employed to simulate streamflow,sediment,total nitrogen(N)and total phosphorus(P)from the Shell Creek Watershed near Columbus,Nebraska and the Logan Creek Watershed near Sioux City,*** streamflow and water quality records for the two watersheds were used to calibrate model parameters that govern streamflow,sediment,and nutrient responses in *** each watershed,precipitation,air temperature,and CO2 concentrations were input to SWAT for four climatic conditions:a baseline condition for the 1980 to 2000 period and the SRES A2,A1B,and B1 climate scenarios for a future period from 2040 to *** from this study suggest that under the three future climate change scenarios,sediment losses are expected to be about 1.2 to 1.5 times greater than the baseline condition for Shell Creek and 2 to 2.5 times greater for Logan Creek;total N losses are expected to be about 1.2 to 1.4 times greater for Shell Creek and 1.7 to 1.9 times greater for Logan *** to the baseline,total P losses under the future climate scenarios are projected to be about the same for Shell Creek and 1.5 to 1.7 times greater for Logan *** from this study also suggest that future projected increases in both precipitation and CO2 concentration account for net increases in streamflow,but in different ways on each watershed.