基于GS的南方水库灌区塘堰蓄水

探讨了基于GIS技术建立塘堰蓄水能力与地形因子关系的方法。提出用稻田塘堰容积率指标来描述塘堰的相对供水能力。用GIS 的空间分析功能，从 DEM获得了研究区域的坡度、高程及河网密度等地形因子。基于实地调查数据，在分析稻田塘堰容积率与单个地形因子关系的基础上，建立了稻田塘堰容积率与地形因子的综合方程。为精确快速的估算区域塘堰供水能力提供了简易的途径，它也可为指导灌区水资源优化管理和灌区改造中新建塘堰容量及位置的确定提供决策依据。

Research on Ponds Water Storage Capacity of Reservoir-irrigated District in Southern China Based on GIS

This article seeks to find a methodology based on GIS that makes it possible to estimate the total ponds storage volumes as a function of the topography factors in an irrigation district.An indicator of ponds storage volumes per rice acreage(PV) is defined to depict the supply capacity of local pond water resources.Different factors of topography are generated from the DEM and the relationships between them and the PV are developed comprehensively with data surveyed the district.The model allows more accurate estimation of ponds storage capacity of the focused region lack of intensive field survey if only we have the topography map.The model can also be used for decision support of optimum water resources management and new building ponds capacity and location in the rehabilitation of irrigation district.