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首页> 外文会议>International symposium on environmental concerns in rights-of-way management >Effects of Natural Gas Pipeline Water Crossing Replacement on the Benthic Invertebrate and Fish Communities of Big Darby Creek, Ohio
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Effects of Natural Gas Pipeline Water Crossing Replacement on the Benthic Invertebrate and Fish Communities of Big Darby Creek, Ohio

机译：天然气管道水交叉置换对俄亥俄州大达比溪的底栖无脊椎动物和鱼群的影响

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摘要

During the fall of 1998, two exposed natural gas pipeline crossings of Big Darby Creek, Ohio were removed and then replaced using open-cut (wet) and flumed (dry) crossing techniques. Big Darby Creek, a national and state scenic river, supports a diverse warmwater fish community that includes several state-listed threatened and endangered species. Instream construction resulted in short-term increases to downstream suspended sediment concentrations, sediment deposition rates, and the amount of fine sediment in riffle habitats. Jersey barrier and sandbag dams, used during the flumed crossing provided a poor seal from the creek flow. Therefore, a similar amount of sediment was released downstream as the open-cut replacement. Increased fine sediment in riffle habitats immediately downstream of the crossing coincided with short-term (<1 year) changes in the abundance and community structure of benthic invertebrates. Small post-construction changes of the abundance and species composition of fish communities were measured at riffles and runs upstream and downstream of construction and therefore, are not considered due to sediment released during instream construction. No long-term (>1 year) changes to benthic invertebrate and fish communities were observed.
机译：在1998年秋季，俄亥俄州大达比溪的两个暴露的天然气管道交叉，然后使用开口（湿）和冲击（干）交叉技术所替换。 Big Darby Creek，全国和州风景秀丽的河流，提供了多样化的温水鱼群，包括若干国家列入的威胁和濒危物种。仪器施工导致短期增加到下游悬浮沉积物浓度，泥沙沉积率和肝脏栖息地的细沉积量。泽西障碍和沙袋坝，在冲泡后使用的是，从小溪流程提供了较差的密封件。因此，随着开口替换，在下游释放了类似量的沉积物。在交叉路口下游的Riffle栖息地中增加了细沉积物，与底栖无脊椎动物的丰富和群落结构的短期（<1年）变化恰逢。在Riffles测量了鱼群的丰度和物种组成的小型施工变化，并在施工期间损坏的沉积物，施工上游和下游运行，因此不考虑。没有观察到底栖无脊椎动物和鱼群的长期（> 1年）的变化。

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