【摘要】 通过开展面向决策者的荒漠化地质环境特征研究和空间表达 (编图与信息系统建设 ) ,反映影响荒漠化的主要地质环境要素及其空间分布 ,为研究荒漠化发生机制、发展趋势、治理对策提供地质依据。空间信息系统建设和编图突出地反映地质环境背景条件的演变对荒漠化发展的内在制约作用 ,以及地下水开发利用对荒漠化的影响。空间信息系统包括 8个逻辑图层集 ,16个图层类型 ,百余个图元属性类型 ,在此基础上编制了 5张成果图件。对荒漠化分布现状进行了信息化统计 ,中国北方地区荒漠化总面积为 197.2 4× 10 4km2 ,占区域面积的 4 3 .6% ,其中潜在荒漠化面积为 5 3 .5 7× 10 4km2 ,其主要分布区应成为研究和治理的重点。经过分析初步确定了影响荒漠化的主要动态敏感因子。更多还原

【Abstract】 Through the study on the geological environment characteristics of desertization and spatial presentation (map compiling and setup of the information system), the main geological environment elements and its spatil distribution have been reflected in the paper so as to provide a scientific basis for studying the occurrence mechanism, developing trend of desertization and its harnessing countermeasures. The setup of spatial information system and map compiling mainly reflects the internal restrictive action of the evolution of the geological environment background conditions on the desertization as well as the effect of exploitation and utilization of groundwater on the desertization. The spatial information system consists of 8 logical map layer series, 16 types of map layers, more than one hundred types of map units. Based on these data, 5 achievement maps have been compiled. In addition, the information statistics of the desertizaton distribution status has been conducted, the total area of desertization in the northern part of China is up to km 2 accountion for % of the region, in which km 2 is the potential desertization area. The main distribution area should be the focus for the study and harnessing. Through the preliminary analysis, the main dynamic sensitive factors affecting the desertization have been determined and they can play a certain role in further geological investigation, monitoring and harnessing to the desertization.更多还原