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基于GIS的南方紅壤丘陵區(qū)小流域匯流網(wǎng)絡(luò)提取研究
摘要： 以南方紅壤丘陵區(qū)寶洞峪小流域作為實(shí)驗(yàn)樣區(qū),在地理信息系統(tǒng)技術(shù)空間分析和水文分析模塊的支持下,采用不同分辨率的DEM為基本信息源,探討了匯流閾值與匯流網(wǎng)絡(luò)密度間的定量關(guān)系.研究結(jié)果表明:匯流閾值與匯流網(wǎng)絡(luò)密度呈定量統(tǒng)計(jì)關(guān)系.經(jīng)過(guò)對(duì)所得數(shù)據(jù)的回歸分析.得出了匯流閾值與匯流網(wǎng)絡(luò)密度的定量回歸模型,其中系數(shù)6呈較明顯的空間分異特征并隨著DEM精度的變化而變化.還提出了一種基于柵格個(gè)數(shù)的匯流網(wǎng)絡(luò)密度計(jì)算方法,通過(guò)在實(shí)際研究中的應(yīng)用,表明該方法可以有效地應(yīng)用到匯流網(wǎng)絡(luò)結(jié)構(gòu)研究中. Abstract： The Baodongyu catchment in red soil hilly region of Southern China was selected as the study site. Under the support of spatial analysis and hydrological analysis module of ArcGIS, the research discussed the quantitative relationship between conflux threshold value and densities of conflux network using DEM with different resolving power. The result showed that there is a quantitative relationship between conflux threshold value and densities of conflux network, which can be expressed by a formula. And the parameters b presented on a change trend with the precision of DEM. The research put forward a good approach of computing conflux network density based on raster number, which could be effectively used to determine drainage structure. 作 者： 李忠武 黃金權(quán) 李裕元 蔡曉迪 曾光明 LI Zhong-wu HUANG Jin-quan LI Yu-yuan CAI Xiao-di ZENG Guang-ming 作者單位： 李忠武,黃金權(quán),蔡曉迪,曾光明,LI Zhong-wu,HUANG Jin-quan,CAI Xiao-di,ZENG Guang-ming(湖南大學(xué),環(huán)境科學(xué)與工程學(xué)院,長(zhǎng)沙,410082;湖南大學(xué),環(huán)境生物與控制教育部重點(diǎn)實(shí)驗(yàn)室,長(zhǎng)沙,410082)李裕元,LI Yu-yuan(中國(guó)科學(xué)院,亞熱帶農(nóng)業(yè)生態(tài)研究所,長(zhǎng)沙,410125)
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