基于遥感的抚河尾闾及入鄱阳湖口演变分析

基于遥感和地理信息系统技术，以1973—2009年的鄱阳湖枯水期遥感影像作为主要数据源，利用影像分类原理提取抚河尾阎及入湖口的河道滩地信息，研究40年来河道滩地的演变规律，并分析引起形态变化的主要因素。具体为：通过定量和矢量叠加方法提取抚河尾闾河道及入湖口的平面形态特征，结果表明，抚河尾闾青岚湖入口处心洲扩，河道东移，河段滩地交替演变，部分河道顺直，入湖口具有河口淤高湖和岸线向湖中心推进的特点；演变受自然和人为因素的影响，其中河道采沙、航道疏浚、植树造林等人为活动影响更大。研究结果对抚河尾闾的河势控制、河道整治及岸线开发利用、生态环境保护提供技术支持。

Analysis of Channel Evolution in Fu River Tail and Poyang Estuary Based on Remote Sensing Technology

Based on remote sensing technology and GIS technology, this paper collects the representative remote sensing images of dry season from 1973 to 2009 in Poyang Lake as main data source. It uses image classification principle to extract channel information of Fu river tail and estuary. It studies the evolvement rule of river shoal evolution in recent 40 years, and analyzes the main factors influencing the morphological changes. The specific is through the method of quantification and vector superposition to extract the surface morphological characteristics of Fu river trail channel and estuary. The result shows that the heart state in extrance of QingLan lake expanding, the river eastward-moving, the river and shoal evoluting alternately, part of river straight. The characteristics of the estuary include estuary silt piled high and shoreline propulsion to the lake center. Evolution is affected by natural and human factors, of which the river sand, waterway dredging, afforestation and other human activities influence is greater. This study result provides technical support for the river regime control, river regulation and exploitation and utilization of coastline, ecological environment protection of Fu River tail.