XI WORLD FORESTRY CONGRESS

Antalya, Turkey, 13 to 22 October 1997


VOLUME 2, TOPIC 9


    STUDY ON SMALL WATERSHED SOIL EROSION CONTROL AND AGRICULTURAL DEVELOPMENT TECHNIQUE IN LOESS GULLED-HILLY AREA

    Sun Baoping1, Zhao Tingning 1

    In order to study the most appropriate model of soil erosion control and small watershed agricultural development techniques, the Ministry of Forestry and the China Science Academy appointed the Beijing Forestry University to implement three National Key Research Programmes of small watershed soil and water conservation, and agricultural development techniques, respectively, in the period of 1981 to 1985, 1986 to 1990 and 1991 to 1995, taking the Huang-jiaercha small watershed of Xiji County in Ningxia Hui Autonomy Prefecture as the case research site. The achievements of the three programmes indicate the best approach to the soil conservation problems of the area. Huangjiaercha small watershed's soil and water conservation practice shows that soil loss of small watersheds has decreased 98% while crop yield per unit area and average income per inhabitant have increased 526% and 566% respectively. The soil erosion control measures and their benefits are discussed in this paper.

    Keywords: Lloess gulled-hilly area, soil erosion, soil and water conservation, small watershed comprehensive harnessment, agricultural development.

    1 College of Soil & Water Conservation, Beijing Forestry University, Xiaozhuang, Haidian District, Beijing, 100083, China. Facsimile: (86 10) 62545024

    AN ANALYSIS OF THE EFFECTS OF A FORESTED CATCHMENT ON FLOOD OBSTRUCTION IN THE RESERVOIR AREA OF THREEGORGE PROJECT OF YANGTZE RIVER IN WEST PART OF HUBEI PROVINCE OF CHINA

    Wang MingYuan1

    Based on comparable data analysis in the forested and the unforested catchment, run-off yield decreased by 57.5% and flood peak between 20% and 90% for each flood in the forest watershed compared with those of the unforested watershed during the observation period from September 1992 to Ju1y 1993. In the rainy season, the most obvious characteristics of water conservation in the forest catchment refer to increase in absorption (interception and infiltration) and consumption (transpiration) for succeeding rainfall.

    Keywords: West part of Hubei Province, forested catchment, flood obstruction.

    1 Associate Professor, Chinese Academy of Forestry, Beijing, China.



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