宿迁市农业灌溉用水合理性及其影响因素研究OA

To strengthen the rational allocation of agricultural irrigation water,this study takes Suqian City as the research object.Based on meteorological data from 2002 to 2024,it integrates multi-source land use data including statistical yearbooks,the China Multi-period Land Use Remote Sensing Monitoring Dataset(CNLUCC),and remote sensing image interpretation of Gaofen-2(GF-2).The Penman-Monteith formula and water balance principle are used to calculate agricultural irrigation water demand,analyze the rationality of water use by comparing actual water consumption with water demand,and explore the influencing factors by principal component analysis.The results of the study showed as follows.1)Rice is the main water consuming crop in Suqian City.Comparative analysis of multi-source data shows that the difference in rice planting area is small.Based on the rice area from statistical yearbooks,calculations indicate that the proportion of rice irrigation water in total irrigation water reaches more than 90%in normal water years and wet years.2)The agricultural irrigation water demand in Suqian City shows an overall upward trend.Compared with water demand,actual water consumption was relatively high before 2013.In the later period,actual water consumption and water demand tended to balance under the guidance of water quota management.3)Natural factors such as air temperature and rainfall are the main factors influencing agricultural water use,while social factors such as policy driven factors are the key factors controlling the overall changes in water consumption and water demand.