CAJ | 학술논문

采用 USGS 发布的贵州省1∶24万 DEM 数据，以贵州省喀斯特高原二级流域单元及地（州、市）行政单元为界线，分别采用集水面积阈值1000和500来计算沟壑密度，构建基于 DEM 的沟壑特征信息提取模型。并通过贵州省1∶25万水系及2005年贵州省石漠化空间分布数据进行了比对，分析了集水面积阈值随喀斯特地貌复杂度变化而变化的规律，并研究了汇流阈值与沟谷网络总长度的量化关系。尝试摸清了河网密度、石漠化分布与沟壑密度之间的关系，并对贵州喀斯特流域地貌的整体空间分布特征提出了一个更新的认识。
채용 USGS 발포적귀주성1∶24만 DEM 수거，이귀주성객사특고원이급류역단원급지（주、시）행정단원위계선，분별채용집수면적역치1000화500래계산구학밀도，구건기우 DEM 적구학특정신식제취모형。병통과귀주성1∶25만수계급2005년귀주성석막화공간분포수거진행료비대，분석료집수면적역치수객사특지모복잡도변화이변화적규률，병연구료회류역치여구곡망락총장도적양화관계。상시모청료하망밀도、석막화분포여구학밀도지간적관계，병대귀주객사특류역지모적정체공간분포특정제출료일개경신적인식。
Based on the data from digital elevation model with the ratio of 1 ∶ 240000 which was published by the U . S .geological survey and taking the secondary river unit and district (state ,city) administrative unit in the karst plateau of Guizhou province as boundary line ,the article calculates the gully density by the drainage area threshold of 1000 and 500 respectively and constructs a DEM - based gully characteristic information extracting model .Through the comparison of 1 :250000 water system and spatial distribution data of karst rocky desertification during the year 2005 in Guizhou province , the article analyzes the change rule of drainage area threshold according to the karst landform complexity and also studies the quantitative relationship between conflux threshold value and total gully network length .The article tries to figure out the relationship among drainage density ,distribution of karst rocky desertification and gully density .In addition , the article aims to have a new understanding of the overall space distribution characteristic in karst river basin landform in Guizhou province .