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| DOI：10.13522/j.cnki.ggps.2019285 |
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| Constructing an Index-based System to Evaluate the Efficacy of Large-scale Remediation of Saline-alkali Soil for Hetao Irrigated District |
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MA Guiren , WANG Liping*, QU Zhongyi, JIA Yonglin, WANG Yuhan
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School of Water Conservancy and Civil Engineering, Inner Mongolia Agricultural University, Hohhot 010018, China
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| Abstract: |
| 【Background】With the increase in the implementation of large national and local-led soil quality improvement projects in recent years, management departments at all levels have suffered from the lack of objective evaluation systems that are classified by categories, goals, and systems. The individual, discrete indicators mentioned in the above, one-sided conclusions can be drawn through the increase or decrease of the index value, which is not conducive to the condensing and promotion of the model that seeks the best effect from it. It will also cause the enthusiasm of the participating project units to be dampened. The evaluation system constructed in this study is based on the improved Delphi method. Through extensive consultation with industry experts and project organization units, they always stand in the perspective of the project organization unit and classify factors of different dimensions according to the goals of performance evaluation. The differences in weight assignments achieve the objective rationality of each evaluation group and evaluation object and the intention of the organizational unit. Developed a set of evaluation method system for saline-alkali land improvement effect in Hetao Irrigation District.【Objective】In order to establish a scientific, systematic and practical large-scale saline-alkali land improvement effect evaluation index system, for the river cover irrigation area saline-alkali area improvement assessment work to provide a basis.【Methods】Relying on the 50,000 acres test demonstration project in Longxingchang Town, Wuyuan County, through combing the different subject units involved in the improvement of salt-alkali land starting point and expected effect, to classify it, for its equipped with reasonable, effective and economically feasible evaluation indicators, The weight of the evaluation index system of salt-alkali improvement effect was determined by the improved Delphi method, and the rules of the sub-target empowerment scoring method were constructed to realize the construction of the evaluation index system for different evaluation targets and different object groups.【Results】The main units involved in the implementation of the project are divided into the following three categories: Enterprises that apply soil improvement products or models to demonstrate improved results,②Scientific research institutes that experiment and control new improved products and methods, ③Enterprises that carry out business activities on large-scale land transfer. Combined with the three main units to develop two types of evaluation system: The first type of system service object for the application of soil improvement products or models to show the improvement effect of enterprises, which is to different degrees of salinized soil improvement effect assessment, the second type of system service object for scientific research institutes, circulation enterprises, to these units of the annual target of the assessment of the degree of achievement. Both systems set up four first-level indicators and eight second-level indicators. The weight coefficient, score base value and scoring unit of each indicator are determined by using the improved Delphi method.【Conclusion】The evaluation system constructed in this study can provide reference and basis for the evaluation of large-scale saline-alkali land improvement effect in river cover irrigation area. |
| Key words: saline-alkali improvement; improved Delphi method; evaluation system; evaluation indicators; weight |
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