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以我国快速城市化区域——上海宝山区为例,基于近20 a经济发展和河系水网变化相关数据,探讨区域河网水系的时空变化规律,不同功能区的河网变化分异特征及其驱动因子。分析结果表明:(1)宝山区的河网水系数量变化经历了基本稳定(1994-2003年)、快速消亡(2003-2006年)、缓慢回升(2006-2008年)3个阶段,这与其城市化发展进程有较好的对应关系;(2)不同功能区域河网数量和水环境质量变化具有分异性,其中水面率大小关系为Ⅲ区>Ⅰ区>Ⅱ区,有机污染综合指数和总磷为Ⅱ区7Ⅰ区7Ⅲ区;(3)不同功能区的河网水系数量和水环境质量对城市化响应具有明显差异,居住用地、工业用地和设施用地的增加是各功能区河网水系变化的主要驱动因素。在此基础上,对于区域防洪除涝问题提出建议,即在城市化进程中,不仅应重视河道数量,更应重视河道长宽度的保护,才能改善河网水质和水生态环境。
Taking the rapid urbanization area in our country, Baoshan District, Shanghai as an example, based on the data of the recent 20 years of economic development and the changes of the river network, the spatial and temporal variation of the river network and the variation characteristics of river networks in different functional areas were discussed. The driving factor. The results of the analysis show that: (1) The change of river network volume in Baoshan District has undergone three stages: basic stability (1994-2003), rapid demise (2003-2006) and slow recovery (2006-2008) (2) There are differences in the quantity of river network and water quality in different functional areas, of which the surface water ratio is in the relationship of area Ⅲ> area Ⅰ> area Ⅱ, organic pollution index and total phosphorus (3) The quantity of river network and water environment quality in different functional areas have obvious differences in response to urbanization. The increase of residential land, industrial land and facility land use is the change of water system in all functional areas The main driver. On this basis, the author puts forward some suggestions on the flood control and waterlogging prevention in the region. In the process of urbanization, not only the number of rivers should be emphasized, but also the protection of the width and width of the river should be taken into account to improve the water quality and ecological environment.