傍河水源地选址适宜性评价方法研究

Study on evaluation method of site suitability for river water sources

傍河取水是能够兼顾供水水量和水质状况的1种取水方式,其选址的适宜性是水源地质量的前提保证。针对傍河水源地选址的适宜性问题,通过建立评价指标体系和模型,实现对水源地选址适宜性的准确评价。基于对哈尔滨市利民区水文地质条件的分析,采用层次分析法通过土地利用类型、安全距离、含水层渗透系数、含水层厚度、河流年平均径流量、河流水质、地下水水质、地下水埋深8个指标构建了傍河水源地适宜性评价模型。确定各指标权重与评分分级标准,利用ArcGIS计算平台分析傍河取水适宜性指数,并根据傍河取水适宜性分级标准对研究区进行适宜性等级分区。研究结果表明,哈尔滨市利民区万宝镇至陈家一带,南到万乐,北至张家店,可作为适宜的傍河水源地。从理论分析和实际应用结果来看,本次研究提出的评价方法适用于傍河水源地选址适宜性分析。

Alongside the river source is one of the most important way to the surface water and groundwater joint development, the water suitability evaluation is the premise guaranteefor thequality and quantity ofwatersourceAccording to the suitability of the site selection of the river water source, this paper establishes the evaluation index system and the model to realize the accurate e-valuation of the suitability of the site selectionBased on the analysis of hydrogeological conditions in Limin District of Harbin City, the suitability evaluation modelalongside the river source region has been establishedby analytic hierarchy process （AHP） through eight indexes including the land use types, safe distance, aquifer thickness, permeability coefficient, aquifer thickness, average annual runoff, river water quality, groundwater quality and groundwater depth, . The index weight and grading classification standardwere determined based on analysis of hydrogeological condition in the study area. The river water suitability index was de-termined by ArcGIS software. Thegradepartition in the study areawas carried out according to the river for water suitability clas-sification standard for suitability. The results show that the study area which WanBao Town to Chen village area, south to Wanle, north to Zhangjiadiancan be used as a suitable water source. This evaluation method can objectively reflect the study area alongside the river source of construction conditions, with strong practicability, the river water source planning and construction in the studied area has important application value.