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Temporal-spatial Changes of Water Resource and Ecological Safety Assessment in Artificial Forest of Carbon Dioxide Capture

Author: ZuoChengHua
Tutor: WangRangHui；NingHuSen
School: Nanjing University of Information Engineering
Course: Ecology
Keywords: Emission reduction Lin Landscape Pattern Groundwater Ecological security
CLC: S715
Type: Master's thesis
Year: 2011
Downloads: 38
Quote: 0
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Abstract


Xinjiang is an arid region of northwest China, is closely related to vegetation growth status and distribution of water resources. Therefore, the study of water resources distribution and variation of its important ecosystem. Ecological security is an important part of national security. Karamay City, is a desert oasis, artificially created by the diversion, vegetation construction and other human activities change the natural ecological environment. This very fragile ecological environment, study the safety of the various ecosystems in the region is particularly important. Through field investigations, sampling and analysis, access to the Karamay abatement forest areas of vegetation, soil, groundwater data. Temporal and spatial variation of soil moisture and groundwater research on this basis as well as the relationship between them and vegetation growth. At the same time build emission reduction the forest ecological security evaluation system. By these studies and obtained the following results: First, the soil moisture is an important limiting factor in abatement forest areas of vegetation. Due to the impact of the topography, vegetation type and other factors, the different location of the same area, or the same location of different soil depth, soil moisture content is different. Emission reduction forest region 0 ~ 40cm layer with higher water content, 40 to 60cm layer of minimum water content, 60 to 100cm moisture content is low. Although the forest areas of different soil profiles in emission reduction of soil moisture in the forest areas of space to show a different distribution characteristics, but all have one thing in common, namely the southern area near the desert minimum. The main factor is the soil texture and vegetation type, vegetation types compared to Ash, Elaeagnus Russian Yang has obvious advantages to maintain soil moisture. Second, the emission reduction forest areas groundwater depth of 11.39 m by 2005 becomes 2010's 3.64m was smaller trends. Space from the west to the east, and abatement forest area groundwater depth showed a deepening trend. The emission reduction Lin groundwater salinity from 2006's 18.925 g / L becomes 2009 14.239g / L soluble salt of temporal and spatial variation of groundwater. Finally, the average abatement forest ecological safety of 3.004, about 60% of regional insecurity, and other general safety, emission reduction forest area as a whole ecological security conditions are bad. 12 evaluation indicators the NDVI, growing desertification index, economic output, and ecosystem service value of the results of the evaluation of the impact higher.

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CLC: > Agricultural Sciences > Forestry > Forestry basic science > Forest Hydrology
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