南京地区农业耗水量估算与分析

结合南京地区的农业生产状况 ,采用Penman -Montieth法计算参考作物的潜在蒸散 ,建立了本地区农业耗水的物理模型 ,计算了南京地区历年的农业用水量 ,并根据实际资料对模型进行了检验 ,结果表明该模型具有较高的精度 ,能够反映农业用水的实际情况。在分析该地区历年农业用水量变化及其用水现状的基础上 ,对影响农业用水量的因素和该地区的农业用水效率进行了分析和计算。南京地区农业用水量的大小很大程度上取决于耕地面积和各类作物播种面积的变化 ,同时也受当年气候状况的影响。南京地区多年的农业用水效率计算结果表明 ,该地区的灌溉水利用率较低。最后对该地区的水资源可持续利用提出了相应的建议

ANALYSES OF AGRICULTURAL WATER CONSUMPTION IN NANJING REGION

This paper adopted Penman Montieth method to calculate potential evapotranspiration of reference crops,in connection with agricultural production situation in Nanjing region to develop an agricultural water consumption model. This model has higher precision when compared with actual data and can reflect the actual status of agricultural water need. Based on the analysis of agricultural water consuming amount and present water consuming situation, this paper analyzes the impact factors of agricultural water consumption and calculates the efficiency of this region's agricultural irrigation. The result shows that the agricultural water consumption amount is mainly determined by the quantity of cultivated land and plant acreage. This region's agricultural irrigation efficiency is lower when compared with other high efficient region. Then,this paper provides some measures and advices for this region to use water resources sustainably.