城市化进程下南昌市城区水系格局与连通性分析

发布时间：2018-03-08 09:24

  本文选题：水系格局　切入点：连通性　出处：《长江流域资源与环境》2017年07期 　论文类型：期刊论文

【摘要】：针对当前城市化引起的水系结构单一化、河流连通性减弱以及水生态环境等问题,以南昌市城区为例,选取1990年、2000年、2010年3期遥感影像图像,分析城市化影响下土地利用的变化;基于1958年地形图与2010年江西省水系图,通过GIS提取两期南昌市城区水系图,选取数量特征和结构特征指标进行水系格局分析,并引入图论理论讨论两时期的水系连通性。结果表明:(1)20 a间城镇用地面积增加174.73 km~2,水域面积减少34.04 km~2。研究区水域面积随城镇用地增加而缩减;(2)城市化进程中,研究区河流水面率、河网密度和河频率均下降,支流发育薄弱,河网复杂度下降;(3)赣江以北水系连通度降低,赣江以南区域水系连通度提升。该研究将为城市化地区河流水系保护提供支持与参考。
[Abstract]:Aiming at the problems of water system structure simplification, river connectivity weakening and water ecological environment caused by current urbanization, taking Nanchang urban area as an example, three issues of remote sensing images, 1990, 2000 and 2010, are selected. Based on 1958 topographic map and 2010 Jiangxi water system map, two periods of Nanchang city water system map were extracted by GIS, and quantitative and structural characteristics were selected to analyze the water system pattern. The graph theory is introduced to discuss the connectivity of water system in the two periods. The results show that the area of urban land increases by 174.73 km2 and the area of water decreases by 34.04 km2 in 20 years. The water area of the study area decreases with the increase of urban land. In the study area, the water surface rate, the density and frequency of the river network are all decreased, the development of the tributaries is weak, and the complexity of the river network is reduced. (3) the connectivity of the river system north of the Ganjiang River is reduced. This study will provide support and reference for river system protection in urbanized areas.
【作者单位】： 南昌大学管理学院;南昌大学建筑工程学院;杭州水利水电勘测设计院有限公司丽水分院;
【基金】：教育部重点人文社科重点课题”中国地区生态文明建设领先路径研究”(15JJD790040)~~
【分类号】：TV213.4
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本文编号：1583329