高原生态保护区内公路施工期地表水评价模型

Surface Water Evaluation Model during Construction of Roads in Highland Ecological Reserves

为了解高原生态保护区内公路施工期造成的地表水环境污染问题,并为施工单位及时掌握地表水环境变化情况提供一定的数据依据及支撑。对公路施工期地表水环境污染源进行分析,选取对于高原生态保护区污染特征具有针对性的水质评价指标因子,建立基于熵权-可拓物元理论的地表水环境评价模型,并结合实际工程验证其适用性及准确性。研究结果表明:①选取石油类、高锰酸盐指数、悬浮物(SS)、氨氮(NH_(3)-N)、总磷(TP)和溶氧量(DO)等6个水质评价指标因子建立评价体系,可以综合反应公路施工期对高原生态保护区地表水环境的影响;②在实际工程应用中,基于熵权-可拓物元理论的地表水环境评价模型得到的分级结果,与单因子指数法及灰色加权关联度法得到的分级结果吻合率达70%及90%,说明该方法具有一定的适用性及准确性。

In order to understand the environmental pollution of surface water caused by road construction in the Plateau Ecological Reserve,and to provide some data basis and support for the construction units to grasp the environmental changes of surface water in a timely manner.Sources of surface water environmental pollution during highway construction were analyzed.The water quality evaluation index factors with targeted pollution characteristics of the plateau ecological reserve were selected.The surface water environment evaluation model based on entropy weight-topological object element theory was established,and the applicability and accuracy of the model were verified in the context of the actual project.The results show these as follows.Six water quality evaluation index factors,such as petroleum,permanganate index,SS,NH_(3)-N,TP and DO,are selected as the evaluation system,which can comprehensively reflect the impact of the road construction period on the surface water environment of the plateau ecological reserve.In practical engineering application,the grading results obtained from the surface water environment evaluation model based on entropy weight extension matter element theory,and the grading results obtained from the single-factor index method and the gray weighted correlation method agree with 70%and 90%,indicating that the method has certain applicability and accuracy.