Concerned with the Critical Ecological Situation in China, according to the concept of the critical Environment and Endangerment, a set of indicators of Ecological Critical Situation has been set up. And with the powe...Concerned with the Critical Ecological Situation in China, according to the concept of the critical Environment and Endangerment, a set of indicators of Ecological Critical Situation has been set up. And with the powerful systematic analytical tool, GIS, a map of it in China by county unit has been worked out.展开更多
This paper researches and analyses the critical envirormental situation in the Middle Reaches of the Yellow River and compiles the map of critical environmental situation of this area (1:2,000,000). Five types of envi...This paper researches and analyses the critical envirormental situation in the Middle Reaches of the Yellow River and compiles the map of critical environmental situation of this area (1:2,000,000). Five types of environmental situation (ES) are divided, namely, conflict ES, critical ES, crisis ES, disastrous ES and accidental ES and 7 groups of main factors are used to identify and classify the critical environmental situation after considering the speciality of this region and the law of guiding factors. They are pollution, endemic disease, soil erosion, drought and water-shortage, forest degeration, wind-erosion and desertification, and soil salinization. Based on mapping and analysis, the paper also concludes the regional distribution law of critical environmental situation of this region and divides it into 8 small districts through combining the critical envirormental situation, regional distribution law and guiding factors. This can provide scientific basis and reference for preserving and renovating the environments with different fragile types and fragile levels.展开更多
基金Under the auspices of the National Natural Science Foundation of China (No.49671034)
文摘Concerned with the Critical Ecological Situation in China, according to the concept of the critical Environment and Endangerment, a set of indicators of Ecological Critical Situation has been set up. And with the powerful systematic analytical tool, GIS, a map of it in China by county unit has been worked out.
文摘This paper researches and analyses the critical envirormental situation in the Middle Reaches of the Yellow River and compiles the map of critical environmental situation of this area (1:2,000,000). Five types of environmental situation (ES) are divided, namely, conflict ES, critical ES, crisis ES, disastrous ES and accidental ES and 7 groups of main factors are used to identify and classify the critical environmental situation after considering the speciality of this region and the law of guiding factors. They are pollution, endemic disease, soil erosion, drought and water-shortage, forest degeration, wind-erosion and desertification, and soil salinization. Based on mapping and analysis, the paper also concludes the regional distribution law of critical environmental situation of this region and divides it into 8 small districts through combining the critical envirormental situation, regional distribution law and guiding factors. This can provide scientific basis and reference for preserving and renovating the environments with different fragile types and fragile levels.
