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| Study on the Quantitative Relationship Between the Sand-Wind Disastrous Climate and the Construction of the Protecting Forest System on the Northeast Edge of Wulanbuh Desert |
| Hao Yuguang 1,2 Ding Guodong1 Zhang Jingbo2 Cao jinghua3 Zhou Jianzhong3 |
| 1 College of Soil and Water Conservation, Beijing Forestry University, 100083,Beijing; 2 The Desert Forest Experimental Center, CAF; 3 Dengkou Forestry Bureau of Inner Mongolia: 015200,Denkou, Inner Mongolia: China |
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Abstract The sand-wind weather data from 1970 to 2000 and the protection forest system construction relative of data from 1977 to 2000 of the Dengkou County had been collected. According to the fixed number of years of protection the “Three-North” protecting forest construction, the sand-wind climate data was divided into 4 periods, construction prophase (8 years), the first period (8 years), the second period (10 years) and the third period (5 years). The statistics results of coefficience analysis and F-statistics suggested that the data of different periods had evident differences. Analyzing the ratio of the elevating sand days and the dust storm days with strong wind days, it showed that the 4 periods protection forest system had marked difference in ecological protective effect on the northeast edge of Wulanbuhe Desert, and the total protective function was increasing gradually. The correlation regression showed that they had notable linear correlation relationship between the sand-wind Weather indexes (strong wind days per year, the elevating sand days and the dust storm days) and protection forest indexes (protection forest area, protection forest volume).
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Received: 23 April 2003
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