青藏工程走廊水环境安全保护等级区划研究

Investigation of Water Environmental Safety Protection Regionalization in Qinghai-Tibet Engineering Corridor

采用模糊数学综合评判法和突变级数法对青藏工程水环境安全的保护等级进行分区评价与研究,结果表明:青藏工程走廊带沿线水环境分为一级、二级和三级保护区3个区域,其中一级区范围为青藏高速公路拉萨—安多段,二级区范围为青藏高速公路安多—茶错段,三级区范围为青藏高速公路茶错—格尔木段;青藏工程走廊水环境安全保护路段共计408.92 km,安全保护等级高,占路线全长的35.56%。建议拉萨—安多全段,以及安多—茶错段部分路(桥)面通过工程措施和非工程措施相结合的方式实现路(桥)面径流污染控制,有效降低路(桥)面径流对走廊带水环境的影响。

The protection grade of water environmental safety in Qinghai-Tibet engineering corridor(QTEC)was studied by using fuzzy mathematics comprehensive evaluation method and catastrophe progression method.The results indicated that the water environment along QTEC was divided into three protection zones.The first grade zone was in Lhasa to Ando section of Qinghai-Tibet expressway.The secondary area was in Ando to Chacuo section of Qinghai-Tibet expressway,and the tertiary zone was in Chacuo to Golmud section of Qinghai-Tibet expressway.There was a section of 408.92 km of high protection grade for water environmental safety in QTEC,accounting for 35.56%of the total length of the expressway.It was suggested that engineering and non-engineering measures should be combined to control road(bridge)runoff in the whole Lhasa to Anduo section and part of Anduo to Chacuo section,and to reduce the impact of road(bridge)runoff on the water environment of QTEC effectively.