| Hydrologic behavior and effect of forest on regulation of river runoff in loess hilly and gully region |
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| DOI：10.7606/j.issn.1000-7601.2003.02.17 |
| Key Words: forest soil hydrologic behavior regulation of runoff The Loess Plateau |
| Author Name | Affiliation | | LIU Xian-zhao | Department of Geogrophy and Toursim, Yantai Normal College, Yantai, Shandong 264025, China
Institute of Soil and Water Conservation, CAS, Yangling, Shaanxi 712100, China | | HUANG Ming-bin | Institute of Soil and Water Conservation, CAS, Yangling, Shaanxi 712100, China |
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| Abstract: |
| The hydrologic behavior of forest soil and effects of forest on the regulation of river runoff were analyzed systematically by comparing of three land use patterns (e. g. forestland, farmland and rang-land) and river runoff in forest area and non-forest area. The results showed that there was a high infiltration rate, low runoff and dry soil profile caused by strong transpiration in forestland. Seasonal distribution of river runoff in forest area become more even than that in non-forest area. The dry soil profile in forest-land, made the regulation capacity of soil reservoir on drought lost, would weaken the proportions of groundwater exchanged from rainfall, and influence the quantity of region water resource and the sustainable development of forest. On the other hand, it would restrict the compensating runoff in dry season. The function of forest averaging seasonal distribution of runoff was realized by reducing the runoff in flood season and compensationg runoff in non-flood season. The benefits of flood reduction by forest were very significant in flood season, and the forest had a better compensatory effect for runoff in dry season, especially from September to November and from March to May, the benefits of compensation reached 4%-10%. |
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