Suitability evaluation of typical soil and water conservation measures in hilly areas of purple soil
DAI Fu-Jiang, LIU Gang-Cai
1. Institute of Mountain Hazards and Environment, Chinese Academy of Sciences & Ministry of Water Resources, 610041, Chengdu; 2. College of Tourism and Land Resources, Chongqing Technology and Business University, 400067, Chongqing;
3. Graduate University of the Chinese Academy of Sciences, 100039, Beijing; 4. Key Laboratory of Mountain Hazards and Earth Surface Processes, Chinese Academy of Sciences, 610041, Chengdu: China
Abstract：In order to select soil and water conservation (SWC) measures appropriately, both Delphi method and fuzzy sets were used to evaluate the suitability of typical SWC measures in hilly areas of purple soil. Evaluation indices were selected based on questionnaire and two evaluation index systems were established from the point of view of requirement-supply and output-expectation respectively. The membership function was set up for each of index according to the relationship between the index and the suitability of SWC measures. Delphi method was used to determine the weights of indices and SWC suitability index was calculated by combining weighted sum with geometric mean. A case study was conducted from Qunli Village in Suining City, Sichuan Province. The results reveal that the specialists place emphasis on the benefits of soil and water conservation as well as natural environment improvement, while the local farmers pay attention to economic benefits of SWC measures. The suitability indices imply that converting cropland to grassland and to forest are more suitable for Qunli Village, in comparison with terrace and contour tillage. It is consistent with the implemented area of these four measures since 1990. The low suitability of terrace and contour tillage is attributed to the factors including lack of labor and investment and low economic benefits.
代富强1,2,3， 刘刚才1,4. 紫色土丘陵区典型水土保持措施的适宜性评价[J]. 中国水土保持科学, 2011, 9(4): 23-30.
DAI Fu-Jiang, LIU Gang-Cai. Suitability evaluation of typical soil and water conservation measures in hilly areas of purple soil. SSWCC, 2011, 9(4): 23-30.
2011, Vol. 9 
