太行山前平原农业活动对地下水影响评价

太行山前平原农业用水是地下水消耗的主体,研究农业活动对区域地下水的影响对促进地下水安全和粮食安全具有重要意义。本文在分析太行山前平原用水特征的基础上,确定有效灌溉面积,满足作物需水的有效降水量,以及主要耗水型作物小麦、玉米和蔬菜种植面积作为反映农业活动对地下水影响的指标要素,运用投影寻踪评价模型和MapGIS技术进行影响程度的评价并进行等级划分,最终根据农业活动对地下水影响程度将太行山前平原分为影响制约区、影响较大区、影响一般区和影响较小区四种类型区。

Impact assessment of agricultural activities on regional groundwater in the piedment of Taihang Mountain

Groundwater used for agricultural accounted for over 70% of the total groundwater consumption in the piedmont of Taihang Mountain. So in order to better guarantee groundwater security and food security, it is very important to study the relationship between agricultural activities and regional groundwater. Based on water consumption characteristics, this paper first determined the influence indexes of agricultural activities on regional groundwater. These indexes included effective irrigated area, quantity of precipitation which can be used for agriculture, wheat area, maize area and vegetables area. Then it combined Projection Pursuit Classification Model and MapGIS platform as a new method to evaluate the impact of agricultural activities. Finally, it divided the piedmont of Taihang Mountain into five zones according to influence degree. They were restricted effecting zone, severe effecting zone, normal effeeting zone and small effecting zone.