Improving the identification of hydrologically sensitive areas using LiDAR DEMs for the delineation and mitigation of critical source areas of diffuse pollution
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- 作者：I.A. Thomasa ; b ; ian.thomas@teagasc.ie" class="auth_mail" title="E-mail the corresponding author ; P. Jordana ; b ; p.jordan@ulster.ac.uk" class="auth_mail" title="E-mail the corresponding author ; P.-E. Mellandera ; per-erik.mellander@teagasc.ie" class="auth_mail" title="E-mail the corresponding author ; O. Fentonc ; owen.fenton@teagasc.ie" class="auth_mail" title="E-mail the corresponding author ; O. Shinea ; oliver.shine@teagasc.ie" class="auth_mail" title="E-mail the corresponding author ; D. Ó ; hUallachá ; inc ; daire.ohuallachain@teagasc.ie" class="auth_mail" title="E-mail the corresponding author ; R. Creamerc ; rachel.creamer@teagasc.ie" class="auth_mail" title="E-mail the corresponding author ; N.T. McDonalda ; noeleen.mcdonald@teagasc.ie" class="auth_mail" title="E-mail the corresponding author ; P. Dunlopb ; p.dunlop@ulster.ac.uk" class="auth_mail" title="E-mail the corresponding author ; P.N.C. Murphyd ; paul.murphy@ucd.ie" class="auth_mail" title="E-mail the corresponding author
- 关键词：CSA ; critical source area ; DEM ; Digital Elevation Model ; HAA ; hydrologically active area ; HSA ; hydrologically sensitive area ; LiDAR ; Light Detection and Ranging ; RBS ; riparian buffer strip ; SMD ; soil moisture deficit ; STI ; soil topographic index ; TWI ; Topographic Wetness Index
- 刊名：Science of the Total Environment
- 出版年：2016
- 出版时间：15 June 2016
- 年：2016
- 卷：556
- 期：Complete
- 页码：276-290
- 全文大小：3357 K
文摘
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A new HSA Index allows for mitigation of pollutant transfers.
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Flow sinks caused 17–33% of catchment areas to become hydrologically disconnected.
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HSA sizes were empirically estimated using rainfall-quickflow measurements.
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HSAs represented 2.9–8.5% of catchment areas during upper quartile storm events.
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Targeting riparian buffer strips at HSA delivery points would reduce costs.