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Control Patterns of Karst Rocky Desertification for Typical Small Watershed and Demonstrations

Author: WangLei
Tutor: ZhouYouYou；HuBaoQing
School: Guangxi Normal University
Course: Physical Geography
Keywords: Small Watershed Governance model Geographical scale Sources and sinks of relations
CLC: X171
Type: Master's thesis
Year: 2011
Downloads: 59
Quote: 1
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Abstract


Rocky desertification in mountain areas of southwest China caused the degradation of the ecological environment, and people living in poverty. Rocky desertification control mode study aims to summarize and generalize a series of effective, rocky desertification control methods available for the promotion of governance. In this paper, occur the area widely but little research of skeletal soil desertification, nowadays rocky desertification area overlay soil erosion, the clastic sandwich under the influence of water logging and other the typical ecological problems, select small pack worthy of a small watershed group music watershed as a typical small watershed in the mechanisms of these typical problems and governance, and demonstration summed governance model. First, summed up the the Guangxi of several karst landform type environment of small watershed characteristics, the rocky desertification problems and the corresponding governance model. Then focus on small watershed in the establishment of three-dimensional conceptual model of group music. And the use of the soil should be evaluated based on gray relational analysis based the Arcmap of soil analysis, ecosystem service function value pre-rating method. Secondly, the design and implementation of the rocky desertification control mode, and the actual problems of the small watershed group music, focusing on select of vegetation recovery mode, herbivorous animal husbandry mode, waterlogging and drought mode for the preliminary design, and proposed the implementation methods . Focus on the means by means of geographic information systems, characteristics according to the discipline of geography, design the layout of each mode. Finally, based on the the WRS system of principle to explore the methods and steps of rocky desertification control mode. Proposed should be different geographical scales to summarize the point of view of the demonstration of different levels of rocky desertification control mode, that is, in the range of five different scales of regional, provincial, county, watershed project area were summed morphological model, resource development mode, ecological model of industrial project mode with farmers operating mode. Then select a typical small watershed research and Governance Demonstration skeletal soil on rocky desertification, soil degradation overlay clastic sandwich waterlogging, and governance model for these problems to optimize the combination establishment of demonstration areas, the design of the demonstration route, mode of demonstration and promotion. This paper presents some innovative view of different levels of rocky desertification control mode, as summarized from different geographical scales, carried out on the the Guangxi karst small basin classification, typical small watershed to establish a conceptual model, according to Karst small basin surface underground two systems The layout of the relationship between the sources and sinks of governance works, make a small watershed unit governance work should focus on the ecological management of non-soluble rock source area, has a certain theoretical value and practical significance.

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CLC: > Environmental science, safety science > The basic theory for the Environment and Science > Environmental Biology > Ecosystems and pollution ecology
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