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Spatial and Temporal Evolution and Driving Mechanism of Man-made Ditches in the Yellow River Delta from 1976 to 2015
Authors
宗敏
栗云召
+3 more
王光镇
赵敏
韩广轩
Publication date
30 January 2017
Publisher
Abstract
人工沟渠作为湿地中高强度人类活动的缩影,强烈影响着湿地的水文过程与生态环境,成为湿地演变的主要驱动力之一.基于1976—2015年黄河三角洲27期遥感影像和1∶10万地形图,通过目视解译获得人工沟渠(农业沟渠和道路沟渠)数据,定量分析了人工沟渠的时空演变过程及驱动机制.结果表明:(1)黄河三角洲人工沟渠长度、密度呈明显的线性上升趋势,其长度、密度年均分别增长160km和53m/km2.农业沟渠长度、密度变化可分为两个发展阶段:2000年以前符合s型函数增长,2000年以后呈现出线性增长的趋势.道路沟渠的长度、密度变化一直表现为明显的线性上升趋势,其长度、密度年均分别增长141km和47m/km2.(2)黄河三角洲人工沟渠长度与农田面积呈显著的线性相关(P<0.05),与养殖池面积具有良好的对数关系(P<0.0001),与道路长度呈极显著的线性关系(P<0.0001).(3)多元回归分析结果表明,农田面积和道路长度对人工沟渠长度的协同影响达到99.9%(P<0.0001). 
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Last time updated on 04/07/2017