摘要
黄土高原正负地形的不同组合特征反映了黄土地貌的发育程度,黄土小流域正负地形的演化则是黄土高原地貌形态发育的缩影。该文采用地理元胞自动机的建模方法,对室内黄土小流域正负地形的演化过程进行建模与模拟。实验通过多次训练神经网络,自动获取转换规则,简化了构建元胞自动机模型的难度,同时,模拟的结果总精度达88.5%。研究表明,该方法可以反映黄土小流域正负地形演化过程中其沟谷扩张、沟头向前以及黄土陷穴的发育特点,对黄土高原地貌发育研究具有重要意义和可鉴性。
In the Loess Plateau,different combinations of positive and negative terrain reflect the degree of the loess landform development,while the evolution of positive and negative terrain of small loess watershed is the epitome of the topographic development of the Loess Plateau.This paper models and simulates the evolution process of the indoor small loess watershed with geographical Cellular Automaton(CA)method.The experiment obtains the transition rules automatically by training neural network,which reduces the difficulty of building a CA model and gets the 88.5% overall accuracy.Research indicates that this method can reflect the characteristic of gully expansion,gully head forward and the development of loess kettle depression in the evolution of positive and negative terrain in small loess watershed.The significant simulation can be referred by the research of the landform development in the Loess Plateau.
出处
《地理与地理信息科学》
CSCD
北大核心
2013年第1期28-31,F0002,共5页
Geography and Geo-Information Science
基金
国家自然科学基金重点项目(40930531)
国家自然科学基金项目(41101349
41171299)
江苏高校优势学科建设工程资助项目(PAPD)
