[关键词]
[摘要]
针对冀中太行山前平原浅层地下水严重超采与农林灌溉用水之间关系问题,应用地学的模数理念、水量均衡理论方法和MapGIS空间特征分析技术,建立了农灌用水与地下水承载力之间适应性状况评价方法及指标体系,以0.49 km2剖分单元精度识别了冀中山前平原农林灌溉用水强度及其与浅层地下水可采资源量之间适应性状况。结果表明,冀中山前平原农林灌溉导致的“极严重不适应”或“严重不适应”状态是浅层地下水超采的主要原因,其中小麦等夏粮作物灌溉用水主导了这些农灌区地下水超采,蔬菜作物和耗水型果林灌溉开采对地下水的影响呈显著增加趋势,应重视这种非理性加剧影响因素。
[Key word]
[Abstract]
Aiming at the problems of the water resources shortage and serious groundwater overexploitation for agricultural irrigation in the central Hebei piedmont plain, based on the precipitation, water resources and agricultural irrigation data since 1978, the evaluation index system and the evaluation method for the adaptability between agricultural irrigation and groundwater carrying capacity were established at an accuracy of 0.49 km2 by applying the earth science module concept, equilibrium theory and MapGIS technology. Evaluation results showed that the agricultural irrigation water intensity was in "serious incommensurate" status in most areas of the Hebei Taihang Piedmont Plain and the agricultural irrigation water was in "very serious incommensurate" state in most groundwater overdraft areas of Hebei plain, in which the summer crops such as wheat crop had an irrigation water intensity of more than 50%, and the ratio of the irrigation water strength of the vegetable crop and the consumption fruit trees in total agricultural irrigation water increases showed a significant percentage increase trend. We should avoid this kind of irrational continuous increase.
[中图分类号]
[基金项目]
国家自然科学基金青年基金项目(41502253;41172214)