Paper No. JAWRA-07-0111-P of the Journal of the American Water Resources Association (JAWRA). Discussions are open until April 1, 2009.
Modeling the Potential of the Northern China Forest Shelterbelt in Improving Hydroclimate Conditions†
Article first published online: 8 OCT 2008
© 2008 American Water Resources Association. No claim to original U.S. government works.
JAWRA Journal of the American Water Resources Association
Volume 44, Issue 5, pages 1176–1192, October 2008
How to Cite
Liu, Y., Stanturf, J. and Lu, H. (2008), Modeling the Potential of the Northern China Forest Shelterbelt in Improving Hydroclimate Conditions. JAWRA Journal of the American Water Resources Association, 44: 1176–1192. doi: 10.1111/j.1752-1688.2008.00240.x
- Issue published online: 8 OCT 2008
- Article first published online: 8 OCT 2008
- Received August 13, 2007; accepted January 16, 2008.
- northern China forest shelterbelt;
- regional climate modeling
Abstract: The forest shelterbelt (afforestation) project in northern China is the most significant ecosystem project initiated in China during the past three decades. It aims to improve and conserve the ecological environment in the project areas. The tree belt stands along the southern edge of the sandy lands, nearly paralleling to the Great Wall. This study used a regional climate model to simulate the potential of improving regional hydroclimate conditions resulting from the afforestation project. Two simulations with preafforestation and postafforestation land cover were performed over East Asia from January 1987 to February 1988. The model resolution is 60 km. The differences between the two simulations suggest that the northern China forest shelterbelt project is likely to improve overall hydroclimate conditions by increasing precipitation, relative humidity, and soil moisture, and by reducing prevailing winds and air temperature. The effects are more significant in spring and summer than fall and winter. Changes in many hydrologic properties (e.g., evapotranspiration, soil moisture, and water yield), however, differ between the dry Northeast China and the moist Northeast China. The hydroclimate effects are also found in the surrounding areas, featured by noticeably moister conditions in the area south of the afforestation project. The results imply that the shelterbelt project would reduce water yield in afforested Northwest and North China during spring, but increase water yield in the afforested Northeast China as well as in the southern surrounding area, offset some greenhouse effects, and reduce the severity of dust storms. Possible improvements of this study by using actual afforestation data, modeling with higher resolution, longer integration and more detailed processes, and analyzing the physical mechanisms are discussed.