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以疏勒河灌区为研究对象,利用2000-2014年MOD13Q1遥感数据,采用植被生长旺季的增强型植被指数(EVI)建立植被生态分区标准,获得人工种植植被区、中覆盖率天然植被区、低覆盖率天然植被区、荒漠稀疏植被区和荒漠区的面积数据,采用阿维里扬诺夫潜水蒸发模型估算了各类生态分区的植被生态需水量,分析了各类植被生态适宜需水量的时空变化规律.结果表明,研究区总植被生态需水量年均增幅达2.64%,其中,人工种植地植被生态需水量年均增幅达3.65%,呈现稳定增长的趋势;天然植被生态需水量年均减少幅度为1.58%,呈现逐步减少的趋势.最后,根据疏勒河干流昌马堡水文站同时期的年均径流量数据,分析了影响植被生态适宜需水动态变化的因素,揭示了植被生态适宜需水量对径流量变化和灌区工程建设的响应关系,为灌区水资源配置提供了科学依据.
Taking Shule River Irrigation District as the research object, the vegetation ecological zoning standard was established by using the MOD13Q1 remote sensing data from 2000 to 2014 and the enhanced vegetation index (EVI) during the vegetation growing season to obtain the artificial vegetation vegetation area, middle coverage natural vegetation area and low Coverage of natural vegetation area, desert sparse vegetation area and desert area of the area data, using Avilianov subduction model to estimate the ecological partition of vegetation ecological water demand, analysis of various types of vegetation suitable for the temporal and spatial water demand The results showed that the ecological water demand of total vegetation in the study area increased by 2.64% annually, of which the ecological water requirement of artificial vegetation increased by an average of 3.65% per year, showing a steady growth trend; the ecological water requirement of natural vegetation decreased year by year The amplitude is 1.58%, showing a trend of decreasing gradually.Finally, according to the data of average annual runoff of the Changma Fort Hydrological Station in the Shule River in the same period, the factors influencing the dynamic changes of vegetation suitable water are analyzed, Response of water requirement to runoff variation and irrigation district construction provides a scientific basis for water resources allocation in irrigation districts.