水足迹视角下的宁夏中卫市农业水资源利用评价  

Evaluation of agricultural water resource utilization from the water footprint perspective in Zhongwei City,Ningxia Autonomous Region

作　　者：王旭[1] 高翔[1] 曹蕾[1] 裘骏一 

机构地区：[1]兰州大学资源环境学院,兰州730000

出　　处：《兰州大学学报（自然科学版）》2015年第5期619-624,共6页Journal of Lanzhou University(Natural Sciences)

基　　金：国家环保公益性行业科研专项项目(201209034)

摘　　要：采用水足迹对宁夏中卫市2006-2011年7类农产品的虚拟水足迹进行识别,结合脱钩系统耦合理论对农业水资源利用情况与农业经济增长间的关系进行评价.结果表明:中卫市农作物产品的绿水、蓝水、灰水足迹和总虚拟水足迹呈逐年递增趋势,平均增长速度最快的是灰水足迹,达到10.6%;水足迹土地密度最低值出现在2008年(28.77×10~4m^3/km^2),之后呈现递增趋势,导致水资源负荷增加;农作物产量大体呈逐年递增趋势,在种植面积未有显著变化的情况下单产增加,农业综合生产能力得到提高;农业水资源利用情况与农业经济增长间关系的扩张性"复钩"和弱"脱钩"现象有规律性,故目前的水资源利用是不可持续的,提高利用效率为重中之重.The method of water footprint was used to measure seven kinds of agricultural products in Zhongwei City,Ningxia Autonomous Region between 2006 and 2011,and combined with the model of decoupling,to evaluate the relationship between agricultural water resources utilization and economic growth rate.The results showed that the green water,blue water,grey water footprint and total virtual water footprint of the crop products showed an increasing trend by year in Zhongwei City,and the fastest average growth rate for the grey water footprint was 10.6%.Water footprint of the lowest density value appeared in the 2008 at 28.77× 10^4 m^3/km^2,presenting an increasing trend which led to the water resource pressure.Crop yields generally showed a trend of increase year by year and,under the condition of no significant change occurring in planting area yield increase,the comprehensive agricultural production capacity was improved.The evaluation of the relationship between water resource utilization and economic growth for agricultural showed that the expansionary ＂multiple hooks＂ and weak ＂decoupling＂ phenomenon appeared with regularity,indicating that the current water resources utilization is not sustainable and that improving the utilization efficiency should be the top priority.

关 键 词：水足迹 农产品 脱钩理论 水资源利用 中卫市 

分 类 号：P964[天文地球—自然地理学]