京津风沙源区沙障固沙技术评价指标体系构建

由于构成材料、规格形状以及自然风向和地貌形态的多样性,不同沙障固沙技术的固沙效果有较大差异,如何科学客观的筛选沙障固沙技术,是保证沙障固沙技术长期稳定发挥其最大作用的重要基础。针对京津风沙源区沙障固沙技术效果评价问题,建立了沙障固沙技术评价的方法体系,明确了沙障固沙技术评价指标集、评价指标权重以及沙障固沙技术评价面临的问题。在沙障固沙技术与地区自然条件、经济发展水平相协调的前提下,基于文献频次法和层次分析法(analytic hierarchy process,AHP)从技术成熟度、技术应用难度、技术相宜性、技术效益、技术推广潜力5个方面共筛选出1项判断性指标、4项准则性指标、14项二级指标和25项三级指标指标,构建沙障固沙技术评价指标体系。该指标体系以技术效益为主导,兼顾功能性和应用性综合评价,从而对京津风沙源区沙障固沙技术进行全面评价。

Establishing evaluation index system for sand-barrier technologies in Beijing-Tianjin sand source regions

Due to the diversity of materials, specifications and shapes, the natural wind directions and landforms, the sand-fixing effects of different sand-barrier technologies are quite different. The scientific and objective screening methods of sand-barrier technology are an important basis for ensuring the sand-fixing technology to play its maximum role in a long-term and stable way. Aiming at the effect evaluation for sand-barrier technologies in the Beijing and Tianjin sand source regions, an evaluation system of sand-barrier technologies was established in this paper. We also defined the evaluation indexes and its weight, clarified the problems faced by the evaluation of sand barrier. Under the premise of sand-barrier technologies in harmony with the natural conditions, economic developmentand based on literature frequency method and analytic hierarchy process (AHP), the evaluation index system of sand-barrier technologies were screened from technology maturity, technology application difficulty, technology suitability, technology benefit, technology promotion potential 5 aspects. The final evaluation index system consisted of one index of judgment layer, four indexes of criterion layer, 14 indexes of indicator layer, and 25 indexes of sub-indicator layer., The index system, taking the technology benefit as the leading factor and considering the comprehensive evaluation of function and application, was used to carry out the full evaluation of sand-barrier technologies in the Beijing and Tianjin sand source regions.