基于模糊评价和缓冲区梯度带的东寨港红树林水质分析  

Water-quality Analysis of Dongzhai Harbor Based on Fuzzy Evaluation & Buffer Gradient Space Analysis Method

作　　者：曹瑞[1] 邱彭华[1] 谢跟踪[1] 

机构地区：[1]海南师范大学地理与环境科学学院,海口571158

出　　处：《节水灌溉》2017年第8期58-63,68,共7页Water Saving Irrigation

基　　金：国家自然科学基金资助项目(41361090);海南省自然科学基金资助项目(412103)

摘　　要：为了解东寨港红树林自然保护区及周边水域在不同时空条件下的水质状况及其原因,分旱、雨两季对邻近陆域养殖塘、保护区码头水域、红树林内、红树林沟渠、红树林外侧海域共设定42个水样监测点,测试了COD、DO、BOD_5、NH_3-N、TP指标值,并采用基于层次分析法的水质模糊评价模型和缓冲区梯度空间分析法进行了综合评价。结果表明:(1)无论单因子污染值分析还是模糊评价,研究区的旱季水质优于雨季,尤以BOD5和TP表现得最为突出;(2)不论是雨季抑或旱季,自陆向海随着空间距离的增加,水体污染程度总体上均趋于下降态势。同一缓冲区梯度带内,旱季水体的污染程度明显低于雨季;(3)养殖塘是所有监测水体中污染最严重的区域,这表明养殖塘是东寨港红树林自然保护区水体最主要的污染源;(4)居民近海捕捞作业具有搅浑效应,也能影响保护区水质状况。In order to understand the water quality of Dongzhai Harbor in different areas and time and its pollution reasons, 42 samples were collected from aquaculture ponds, protected area wharf water area, mangrove forest, mangrove ditch, the mangrove forest outer sea in dry and rainy season, and the contests of COD, DO, BOD5, NH3-N, and TP were measured, and the comprehensive evaluation and analysis were conducted by using the water quality fuzzy evaluation model based on AHP and the gradient space analysis method. The results show that：（1） under whether the single factor pollution value analysis or fuzzy evaluation, the water quality in the dry season is greater than that in the rainy season, and BOD5 and TP performance is especially the most prominent; （2） whatever in the dry season or rainy season, with the increase of space distance from land to sea, water pollution tends to decline; in the same buffer gradient space, the water pollution degree in dry season is evidently lower than that in rainy season ; （3） The pollution of aquaculture ponds is the most serious, which shows that the aquaculture pond is the main pollution source for the water body in Dongzhai Harbor; （4）residents offshore fishing has roiled effect, it also can affect the water quality of Dongzhai Harbor.

关 键 词：模糊评价 梯度带空间分析法 东寨港 水质评价 时空变化 

分 类 号：S271[农业科学—农业水土工程] X824[农业科学—农业工程]