Estimation of spatial and temporal pattern of agricultural irrigation water use based on MS-PT Algorithm and analysis of influence factors on the northern slope of the Tianshan Mountains
Based on the soil water balance equation,remote sensing data and Modified Satellite-Based Priestley-Taylor(MS-PT)algorithm,agricultural irrigation water use at 0.1°×0.1° spatial resolution on the northern slope of Tianshan Mountains during 2018-2020 was estimated,which was compared with the estimated results of each county obtained by the quota method.The key result,evapotranspiration,was verified by using flux tower data.The results showed that irrigation of the study area was mainly from April to September,and the irrigation water use in July was the highest.Three-year average irrigation water use was 9.890 billion m3/a,which was similar to the estimated result of the quota method(9.458 billion m3/a).At the same time,in the areas with relatively developed agriculture,like Wusu City,Shawan County,Manas County and Hutubi County,the agricultural irrigation water use was relatively large.What's more,the planting structure and the planting area of crops were main factors affecting agricultural irrigation water use on the northern slope of the Tianshan Mountains.
irrigation water usewater balance methodquota methodnorthern slope of the Tianshan Mountains
万方数据
维普
