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| Analysis on eco-economic process of small watershed comprehensive management in loess hilly region: A case study on Litaiping small watershed in Longde county of Ningxia |
| Dang Xiaohu1,2, Liu Guobin2, Zhang Guangjun3,Ma Yueling4 |
| 1.Graduate School of CAS, 100039, Beijing;2.Institute of Soil and Water Conservation, CAS and MWR, 712100, Yangling, Shaanxi;3.College of Resources and Environment, Northwest Sci-tech University of Agriculture and Forest, 712100, Yangling, Shaanxi;4.Bureau of water resources, 756300, Longde, Ningxia: China |
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Abstract From the point of eco-economic system analysis, the eco-economic system structure and succession process are analyzed to evaluate eco-economic benefits in small watershed management. The land utilization structure as well as suitability, industry structure, consumption structure and the balance between supply and demand for forage were analyzed by comparison in small watershed eco-economic system. And the land utilization structure was optimically simulated by using linear model. The stability of economic system was described with the diversity index of ecological system stability, and the economical benfits was evaluated adopting static and dynamic models. The results showed that the ratio of cropland, woodland and pasture land was changed from 6.2∶2.0∶1.0 in 1990 to 1.9∶1.4∶1.0 in 2003. The proportion of agricultural production decreased from 79.6% to 54.8% , and the proportion of forest and husbandry as well as sideline production increased from 9.6%, 9.6% and 1.1%, to 22.7%, 15.1% and 7.4% respectively. The diversity index of the income tended to increase. The consumption structure tended to rationalization, and the balance between the supply and demand of forage was kept. All indexes in economic evaluation showed that economic benefits was remarkable . All results indicated that the eco-economic structure of the watershed was obviously favorable for progressive succession, which tended to stability with significant eco-economic benefits.
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Received: 11 January 2005
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