关中—天水经济区土地生态系统水土保持价值收

摘要/Abstract

摘要： 水土保持价值的计算,对土地的可持续利用以及生态与环境的协调发展具有重要意义。利用遥感数据、DEM数据和统计数据,应用遥感与地理信息系统技术,以关中—天水经济区为研究对象,对该区域1980年、2000年、2005年和2010年的水土保持价值进行了测算。结果表明:关中—天水经济区的水土保持价值是逐年上升的,且涨幅不断增大,从1980—2000年增加了2.54×10¹⁰元,2000—2005年增加了1.56×10¹⁰元,2005—2010年增加了3.59×10¹⁰元,其中耕地、林地和草地的水土保持价值较大,水域、城乡居民建设用地和未利用地的水土保持价值较小。此外,水土保持价值的分布与植被覆盖度呈正相关。若要提高全区的水土保持价值,需要加强基本农田保护措施和林地、草地建设,提高林地、草地覆盖度。

关键词: 土地利用, 土壤侵蚀, 土壤保持量, 水土保持价值, 关中—天水经济区

Abstract: Calculation of the value of water and soil conservation is of an important significance for sustainable land use and coordinate ecological and environment development. A case study of calculating the value of water and soil conservation in the Guanzhong-Tianshui economic zone in 1980, 2000, 2005 and 2010 was carried out based on the remote sensing data, DEM data and statistical data using the geographic information system and remote sensing means. The calculated results showed that the value of water and soil conservation in the Guanzhong-Tianshui economic zone was increased year by year, its increase trend became more significant, and it was increased by 2.54×10¹⁰ yuan during the period from 1980 to 2000, by 1.56×10¹⁰ yuan during the period from 2000 to 2005, and by 3.59×10¹⁰ yuan during the period from 2005 to 2010. In which the value of water and soil conservation was high in cultivated land, woodland and meadow, but low in waters, urban and rural construction land and unused land. In addition, there was a positive correlation between the distribution of value of water and soil conservation and vegetation coverage. In order to improve the value of water and soil conservation in the study area, it is suggested to strengthen the protection of basic farmland and woodland and grassland construction, and improve the coverage of woodland and meadow.

Key words: land use, soil erosion, soil conservation quantity, value of water and soil conservation, Guanzhong-Tianshui economic zone

张伟, 李晶. 关中—天水经济区土地生态系统水土保持价值收[J]. 干旱区研究, 2013, 30(6): 1136-1143.

ZHANG Wei, Li Jing. Value of Water and Soil Conservation in Land Ecosystem in the Guanzhong-Tianshui Economic Zone[J]. Arid Zone Research, 2013, 30(6): 1136-1143.

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