Depth of annual runoff and annual erosion modulus were chosen as the indicators of soil and water loss,and the succession of soil and water loss in four typical morphogenetic zones in the central Loess Plateau during last 50 years was analyzed by Fourier transform.
为了揭示黄土高原水土流失的时空演化特征,该文选择了黄土高原中部4种典型地貌区域,以年径流深度和年侵蚀模数为水土流失过程参数,采用波谱分析方法和多元回归分析方法对该地区水土流失的周期和演化趋势进行了探讨,分析了不同地貌区域的水土流失特征及近50年来各地貌区域水土流失的演化过程。
The new methodology of geomorphologic zonalization in Xinjiang based on geographical grid;
基于地理格网的新疆地貌区划方法与实现
The landforms of China and the Karst ecological environment in Guizhou;
中国地貌与贵州岩溶生态环境
This paper introduces the fundamental concept, basic functions, mathematical models, analyzing methods and applications of a landforms information system developed by Beijing University taking the geographical information system (GIS) as its basic platform.
介绍了北京大学以地理信息系统为基本平台的一种地貌信息系统的基本构思、基础函数、数理模型、分析方法和应用。
Compared with the change of landforms, the existing survey drawing of city and mountain areas renew slowly so we have no exact drawing for reference.
在城镇、山区等地貌复杂的地区,由于现有测绘资料更新滞后于地貌变化,使施工无可靠的资料可参考,给测绘工作带来极大不便。