黄淮海平原作物灌溉需水与耕地生产潜力的耦合分析

Coupling Analysis on the Crop Irrigation Water Requirements of Huanghuaihai Plain and the Potential Yield of Cultivated Land

对1991年和2000年气象数据进行空间插值,获得了黄淮海平原气象指标1km×1km空间网格数据,然后借助GIS数据处理与空间分析功能,通过计算参考蒸散量、作物需水量,估算了1991年和2000年黄淮海平原耕地作物灌溉需水量,并分析了其时空变化规律。利用农业生态地带模型(AEZ)计算了耕地生产潜力,通过对作物灌溉需水与耕地生产潜力的空间耦合分析,发现作物灌溉需水与耕地生产潜力之间呈线性正向相关,表明黄淮海平原灌溉需水满足程度是耕地生产潜力的一个制约因素。

Based on the site-based meteorological data in 1991 and 2000, the irrigation water requirements of cultivated land was estimated, the regional differences were explored and the changes from 1991 to 2000 were analyzed using the GIS methodologies. Then the potential yield of cultivated land was calculated based on the AEZ -China model. By the coupling analysis, the positive correlation between the irrigation water requirements and the potential yield of cultivated land was explored. So the irrigation water requirements was a constrain factor on the potential yield of cultivated land in the Huanghuaihai plain now. The result laid the referrences for reasonably using water resources of Huanghuaihai plain and drawing scientific decision on enhancing water efficiency.