地表过程与资源生态国家重点实验室高尚玉、张春来、邹学勇、伍永秋、石莎、李汉东等人基于实地调查，运用GIS技术、模型等方法，在宏观计算并对比了2001年、2005年京津风沙源治理工程区植被恢复状况、土壤侵蚀、地表释尘、区域可持续发展等综合指标的基础上，多角度客观分析和论证了气候变化条件下京津风沙源治理工程取得的环境效益，2008年撰写成《京津风沙源治理工程效益》一书。主要内容包括：

（1）2005年工程区植物多样性指数较2001增加0.45～1.65，均匀度指数增加0.05～0.28；植被总盖度提高12.06%；植被净第一性生产力和植被固碳量净增10.1％。

（2）采用土壤风蚀经验模型和通用土壤流失方程，获得治理工程实施前后土壤侵蚀量变化：2005年土壤风蚀总量比2001年净减少1.96亿t，减幅16.4％，扣除风力环境变化的影响，2005年治理工程抑制的土壤风蚀量为1.00亿t；土壤水蚀总量比2001年减少1.8亿t，减幅50.7％；治理工程由于改善了植被状况而控制了一半以上的土壤水蚀量。

（3）2001、2005年工程区地表释尘量分别为3124万t和2629万t，2005年比2001年减少15.8％，扣除风力环境变化对释尘量的影响，2005年治理工程抑制的地表释尘量为356万t；工程区释尘总量中，2001、2005年可能到达北京城区的尘量分别为149.4万t和110.7万t，2005年比2001减少38.7万t；2005年治理工程抑制了约25.6万t可能到达北京城区的尘量。

（4）工程区2005年区域社会经济可持续发展指数比2001年增加22％，其中，增量的四成来自于治理工程的贡献。因此实施京津风沙源治理工程产生的环境改善效果，对区域经济社会的中长期发展具有十分积极的作用。

 

 

 

Benefits study on Beijing- Tianjin Sand Source Control Engineering

 

Based on first-hand survey data，empiric models and GIS technique, Prof. Shangyu Gao, Chunlai Zhang, Xueyong Zou, Yongqiu Wu of the State Key Laboratory of Earth Surface Processes and Resource Ecology, Dr. Shashi and Prof. Handong Li finished Benefits study on Beijing- Tianjin Sand Source Control Engineering. In this book, it calculates vegetation restoration, soil erosion, land dust-emission and regional Social and Economic Sustainable Development Index of 2001 and 2005 within the engineering region on a macro-scale. By muti-angle analysis, it demonstrates the environmental benefits brought out by the implementation of the engineering under changing climate.

(1) Compared with 2001, plant diversity index of 2005 increased by 0.45~1.65, evenness index increased by 0.05~0.28, average vegetation coverage increased by 12.06%, and plant net primary production and plant carbon fixation increased by 10.1% respectively.

(2) Using wind erosion model and universal soil loss equation, it gains changes of soil erosion during the 5 years in the Beijing-Tianjin Sand Source Region. Total soil wind erosion was 995 million ton in 2005 with a net decrease of 16.4% compared with 1191 million ton in 2001. Deducting the effect of the changing wind environment, net decrease of soil wind erosion was 100 million ton. Total soil water erosion was 170 million ton in 2005, reducing prominently by 50.7% compared with 350 million ton in 2001. Without considering the effect of promoting vegetation restoration by the engineering, the amount of water erosion would have increased by 86.98 million ton due to enhancement of rainfall- runoff erosivity in 2005, which indicated that the improved vegetation weakened the rainfall- runoff erosivity and controlled half amount of the water erosion.

(3) Dust- emission to the atmosphere resulting from soil wind erosion, which was 26.29 million ton in 2005, decreased by 15.8% compared with 31.24 million ton in 2001. Deducting the effect of the changing wind environment, the net decrease of dust- emission was 3.56 million ton in 2005. The possible amount of dust arriving at the downtown of Beijing from the Beijing- Tianjin Sand Source Region was about 1.11 million ton in 2005, 0.387 million ton less than that in 2001. Deducting the effect of the changing wind environment, about 256000-ton dust was restrained from getting to Beijing in 2005.

(4) Regional Social and Economic Sustainable Development Index of the Beijing-Tianjin Sand Source Region in 2005 was 22% higher, in which 40% increase resulted from the sand control engineering. So the remarkable environmental improvement produced by control engineering played a positive role in promoting middle and long time development of the regional society and economy.

Benefits study on Beijing- Tianjin Sand Source Control Engineering, Beijing: Science press. 2008 ISBN978-7-03-022154-4