PS 23-61
A study on technology of ecological zones and management strategy: Taking the central and southern area of Tibet as an example
The division of ecological region is the base for the management and sustainable development of ecosystems and natural resources. It provides the scientific support to environmental protection and the formulation of environmental management policies. The ecological zoning has identified different ecological regions via analysis geologic type, landform, vegetation type, weather pattern, soil type, land-use type, wildlife, hydrological factors since 1970. However, such research is rarely take overall ecological environmental features as the background into consideration, without the focus of regional ecological risk.
In this study, regards central and southern Tibet as a study area, the regional comprehensive ecological assessment index hierarchy and model have been established by impact factors including risk of natural disasters, risk of man-made activities, ecological sensitivity and ecological service importance, and also considering regional natural features, ecological background and socio-economic development. In this paper, according to spatial overlay analysis, the integrated assessment index of ecological region will be obtained integrate with landuse data into study area. After the result of scheme on ecological control division in central and southern Tibet, the relative advice and strategy will be established especially about regional sustainable development.
Results/Conclusions
As is illustrated into the assessment result, various ecosystem into the study area have played a significant role in soil and water conservation and biodiversity. However, the natural protective coverings of soil are destroyed because of development activities in recent years, so that the phenomenons of soil and water losses are much more serious in the middle reaches of the Yarlung Zangbo River. What’s worse, so many traditional biomass, such as firewood and turf, are applied for life energy in agricultural and pastoral areas, which resulted in the function of water conservation is impaired and shrub steppe disappeared largely in some areas.
The results of ecological zoning express that 39.9% area has been divided as to the key controlled zone in central and southern Tibet, the general controlled zone account for 44.6% area, the rest (15.5%) as to the exploitative zone. In conclusion, the key controlled zone is suggested to be restricted development zone to establish an ecological compensation mechanism. Secondly, the general controlled zone is suggested to control and exploitation with effectively managing development activities in terms of massive environmental influence. Thirdly, the exploitative zone is supposed to develop moderately under scientific control of environmental pollution.