摘要
中国是世界上水土流失最严重的国家之一,要进行水土流失的治理,首先要对中国的水土流失的现状和宏观趋势进行评价。研究试图采用全数字化方式,对中国潜在水土流失进行评价,为国家和区域水土保持和生态环境建设决策提供依据。研究结果包括:编制了中国水土流失类型图;确定了一套适合中国潜在水土流失宏观定量评价的指标体系,建立中国潜在水土流失评价数据库;以评价数据库为基础,进行了单因子分析和多因子评价分析,并基于"专家知识"完成了中国潜在水土流失评价与制图;在地理信息系统支持下,初步实现了多源数据集成的程序等。
China is one of the suffering severe soil erosion in the word, and soil loss becomes the important social and environment issues in socialeconomy sustainable development. Therefore, it is necessary for scientists to evaluate soil and water loss in countrywide. Based on analysis of soil erosion processing and the environment characters, factors and variables, basic unit map and database potential erosion assessment, evaluation of potential soil erosion in China has been researched in digital map platform. The main results are:(1)Soil and water loss type and environment characters in China are analyzed; based on remote sensing interpret and geographical thematic mapping, using digital cartography method, soil loss typezone in China is mapped, which build a unified base for integration of multiple data and mapping of soil loss assessing.(2)Based on the newest research on assessment of soil and water loss in home and abroad, according to soil and water loss and environment characters in China, variable of China potential soil and water loss assessing are developed. The involved data are collected and integrated, a spatial database of China potential soil and water loss assessing has been built.(3)Based on the spatial database of China potential soil and water loss assessing, main factors affecting potential soil and water loss, including meteorology, topography and soil, are analyzed and mapped. Comprehensive assessment and mapping of China potential soil and water loss has been completed using expert knowledge.(4)Based on the GIS, integration of multiple data was initially programmed, which applied a theoretic and technique support for rapid integration of multiple spatial data and effective management in assessment mapping of regional soil and water loss.
出处
《水土保持学报》
CSCD
北大核心
2002年第4期49-53,共5页
Journal of Soil and Water Conservation
基金
国家自然科学基金重点项目"东北黑土区土壤侵蚀机理与土壤退化预警"(40235056)
国家重点基础研究发展规划项目"草地与农牧交错带生态系统重建机理及优化生态-生产范式"(G2000018605)
中国科学院知识创新项目(99-01-05)资助
