Journal
ENVIRONMENTAL GEOLOGY
Volume 47, Issue 8, Pages 1138-1149Publisher
SPRINGER
DOI: 10.1007/s00254-005-1252-z
Keywords
highway construction; stormwater runoff; karst; sinkhole risk
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In karst-rich regions, it is inevitable that roadways cross karst landscapes. Road building across such terranes faces environmental and engineering challenges because of impacts on water quality from stormwater runoff and concerns of sinkhole collapse under or near roadways. When highway runoff drains rapidly into subsurface conduit networks through open sinkholes and/or sinking streams, the impact of the runoff on the karst aquifer can be qualitatively evaluated by mixing cell models. Formulation of a comprehensive stormwater runoff management plan prior to roadway construction can minimize the associated adverse impacts. The commonly used best management practices help manage the stormwater runoff effectively in some sites. Site-specific management plans are preferable for other sites because of concerns of flooding and land stability. Proactive measures should be taken to identify areas of the greatest sinkhole collapse risk along the proposed route and the associated groundwater drainage patterns.
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