Highway collapse hazard is the combined result of many factors. Based on the formation mechanism of the road collapse hazard and main the factors, they are selected from three aspects of risk assessments master factor: the regional geological structure, slope characteristics, and regional environmental characteristics, also ultimately select the spacing of the joints, slope lithology, slope structure, slope height, slope gradient, rainfall (rainfall in 24 hours to ≥ 25mm of days), the vegetation coverage degree and earthquake strong eight main control factors, above all these factors, they established a road collapse hazard evaluation index system. Based on the fuzzy comprehensive evaluation method, it establishes a road collapse hazard evaluation model. Analytic Hierarchy Process is used to determine the evaluation index system of layers in index weight values. Risk index is based on the evaluation criteria. Finally, an empirical study of two highway projects instances.

Evaluation of soil and water conservation benefits in region is concerned more and more by government and relevant experts. First, considering small watershed, this paper analyzes the soil and water conservation benefits deeply in this special area from different views which are ecological, economic and social benefits. Then, on this basis, it proposes comprehensive evaluation index system framework of soil and water conservation benefits and describes the specific indicators and their content included in the ecology, economy, and society subsystem. At last, it hope that this research results can present the scientific evidences for scientific, reasonable and accurate quantitative evaluation of regional soil and water conservation benefits especially small watershed in the future.