摘要
基于淮河流域、黄河源区、东江流域三类不同地形区的DEM,利用简单差分、二阶差分、Frame差分、三阶不带权差分、三阶反距离平方权差分、三阶反距离权差分六种算法计算了坡度、坡向值,引入面积累积曲线来判断六种坡度、坡向计算方法在三类不同地形区的适用性。结果表明,三阶差分系列算法在三个地区适用性较好;简单差分、二阶差分的适用性较差;Frame差分在黄河源区、东江流域的坡度、坡向计算中结果较好。
Based on the DEM of different terrain areas including Huaihe Basin, source region of Yellow River and Dongjiang Basin, six kinds of algorithms are applied to calculate the slope and exposure, which are simple difference, seeond-order difference, Frame difference, third difference, third-order reverse distance square weighted difference and thirdorder reverse distance weighted difference. And then area mass curve is used to determine the applicability of the six algorithms. The results show that the series of three-order difference algorithms have good applicability in three regions while the simple difference and second-order difference algorithm have bad applicability; Frame difference algorithm has good applicability for calculation slope and exposure in Yellow River Basin and Dongjiang River Basin.
出处
《水电能源科学》
北大核心
2011年第6期68-70,102,共4页
Water Resources and Power
基金
国家重点基础研究发展计划基金资助项目(2010CB951101)
国家自然科学基金资助项目(40830639
50879016
50979022)
水利部公益性基金资助项目(200801027)
水文水资源与水利工程科学国家重点实验室专项经费基金资助项目(1069-50985512)
