中文摘要：

受气候变化和人类活动的影响,水循环过程发生改变,单纯基于用水侧考虑已不能完整反映区域的水资源问题,必须从水资源物理成因角度开展用水控制。本文从水资源的自然属性出发,以水循环过程为基础,重点阐述了基于ET控制的水资源管理的基本理论与方法,针对平原区县域的特征,提出了基于ET控制的平原区县域水资源管理模型及计算方法,并以地下水超采典型区—滦南县为例进行了实例应用。模型以县域ET控制为手段,以消减ET实现为目标,从水资源的物理驱动过程入手,考虑了产业发展、种植结构、节水潜力以及地下水超采等县域发展的实际问题,使规划管理方案更贴近县域生产实际,控制超采更具可操作性。

英文摘要：

The potential changes are occurring in the Earth＇s water cycle due to climate change and hu- man activities, which cause water supply system mainly affected by hydrological processes are extremely complex and variable. Water resources management based on water demand has been not an accurate reflection to the regional water resources status. It needs us develop water resources management from the perspective of water cycle. This study introduces the basic theory and method of water resources management based on evapotranspiration （ET） control, and put forward the ET-based model on county-territory scale and its calculation method. The ET-based model is different from the traditional method, origins from regional water cycle process and stresses the natural attributes of water resources. In addition, this study considers Luannan County with over-pumping groundwater and further discusses the case study about water resource allocation based on ET. The research shows the ET-based model chooses ET control as the means, cutting ET as the goal, physical drive processes of water resources as theoretical basis, and takes into account many practical problems related with county development such as the industrial development, planting structure, water-saving potential and excessive exploitation of water resources. The treatment can make the planning scheme from the model is accord with the actuality of regional development and give controlling the over-pumping exploitation of water resources more maneuverable.