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    基于损毁数量与强度的东北黑土区侵蚀沟治理措施保存率评价方法

    An evaluation method for the survival rates of gully control measures in the Black Soil Region of Northeast China based on the number and intensity of damage

    • 摘要: 【目的】针对东北黑土区侵蚀沟治理措施保存率调查缺乏量化标准、主观性强等问题,构建一套可重复、可量化的保存率调查与评价方法。【方法】从损毁数量与损毁强度2个维度,提出沟头防护、谷坊、连续柳跌水、护岸(坡)、填埋修复及植物措施等6类典型治理措施保存率等级的标准化判定方法。【结果】典型沟道验证表明,3名不同背景的调查人员对3项措施共9次判定结果完全一致,各指标测量值相对偏差均小于8%且未引起等级变化,说明本方法具备良好的可重复性与操作者间信度。应用该方法对东北黑土区15个典型旗(县)235条已治理侵蚀沟的调查显示:各类工程措施的平均保存率均高于75%,其中填埋修复最高(92.5%),连续柳跌水与谷坊相对偏低(77.9%、76.6%);植物措施平均保存率为73.9%。【结论】本研究尝试将侵蚀沟治理措施保存率评价从“有无保留”的主观判断转向基于“功能保留”的量化评估。初步验证表明,该方法在典型沟道中具有良好的可重复性,可为黑土区侵蚀沟治理成效的标准化调查提供方法参考。

       

      Abstract: Objective Addressing issues such as the lack of quantitative standards and high subjectivity in surveys of the survival rates of gully control measures in the Northeast Black Soil Region, this study developed a reproducible and quantifiable method for surveying and evaluating survival rates. Methods Based on the two dimensions of the number of damaged structures and the severity of damage, we proposed a standardized method for determining the survival rate grades of six typical remediation measures: gully head protection, check dams, continuous willow drop structures, bank protection, backfilling and restoration, and vegetation measures. Results Three investigators with different professional backgrounds reached complete agreement on the survival rates of three control measures in a single gully across a total of nine assessments. Additionally, the relative deviations in the measured values for each indicator were all less than 8%, and these deviations did not result in changes to the assessment ratings. This indicates that this method possesses good reproducibility and inter-rater reliability. Furthermore, this method was applied to survey 235 controlled erosion gullies in 15 typical counties in the Northeast Black Soil Region. The results showed that the average survival rate for all types of engineering control measures exceeded 75%, with backfilling and restoration having the highest survival rate at 92.5%, while the survival rates for continuous willow drop structures and check dams were relatively low at 77.9% and 76.6%, respectively; the average survival rate for vegetation control measures was 73.9%. Conclusions This study established an evaluation method for assessing the survival rate of gully control measures, shifting from subjective judgment to an assessment based on functional retention. This method demonstrates good reproducibility in surveys of typical gullies and can serve as a reference for evaluating the effectiveness of control measures in black soil regions.

       

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