Using SWAT to simulate crop yields and salinity levels in the North Fork River Basin,USA

作     者：Aaron R.Mittelstet Daniel E.Storm Art L.Stoecker 

作者机构：Department of Biosystems and Agricultural EngineeringOklahoma State UniversityStillwaterOklahoma 74078USA Department of Agricultural EconomicsOklahoma State UniversityStillwaterOklahoma 74078USA 

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：2015年第8卷第3期

页      面：110-124页

核心收录：

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

主　　题：salinity SWAT crop yield wheat modeling cotton modeling Red River 

摘      要：Crop yields and salinity levels in the North Fork of the Red River(North Fork River)basin,located in southwestern Oklahoma and the Texas Panhandle,were analyzed based on the diverse climate in the *** irrigation water is a major problem in the *** Elm Fork Creek flows through salt deposits,making the creek and its receiving stream,the North Fork River,too saline to use for *** greatly reduces the number of hectares that can be utilized for agricultural crops within the basin.A baseline SWAT model was setup,calibrated and validated to simulate streamflow and wheat and cotton *** SWAT model and a regression equation were used to analyze variable weather impacts on crop yields and salinity *** the weather generator WXGEN and 58 years of observed weather data,ten 50-year weather datasets were *** from the weather generator was input into the calibrated SWAT model to simulate wheat and dryland and irrigated cotton yields for the ten weather *** an empirical relationship between ionic strength and streamflow,salinity levels were *** the crop yields varied greatly from year to year,the yields were not significantly different over the 50-year simulation *** electrical conductivity(EC,expressed in decisiemens per meter or dS/m)at the US Geological Survey gage station just downstream of the salt deposits was significantly different with levels ranging from 40 to 65 dS/*** the water in the Elm Fork is much too saline to use for irrigation,the water in the North Fork River may be used as long as the flow rates in the river are greater than 0.60 m3/*** order to optimize the available cropland,a salinity control must be installed upstream of the salt deposits on the Elm Fork Creek.