{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2025,11,6]],"date-time":"2025-11-06T12:17:04Z","timestamp":1762431424278,"version":"build-2065373602"},"reference-count":53,"publisher":"MDPI AG","issue":"4","license":[{"start":{"date-parts":[[2018,4,17]],"date-time":"2018-04-17T00:00:00Z","timestamp":1523923200000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Remote Sensing"],"abstract":"<jats:p>Riparian forest (CP22) buffers are implemented in the Chesapeake Bay Watershed to trap pollutants in surface runoff thus minimizing the amount of pollutants entering the stream network. For these buffers to function effectively, overland flow must enter the riparian zones as dispersed sheet flow to facilitate slowing, filtering, and infiltrating of surface runoff. The occurrence of concentrated flowpaths, however, is prevalent across the watershed. Concentrated flowpaths limit buffer filtration capacity by channeling overland flow through or around buffers. In this study, two topographic metrics (topographic openness and flow accumulation) were used to evaluate the occurrence of concentrated flowpaths and to derive effective CP22 contributing areas in four Long-Term Agroecosystem Research (LTAR) watersheds within the Chesapeake Bay Watershed. The study watersheds include the Tuckahoe Creek watershed (TCW) located in Maryland, and the Spring Creek (SCW), Conewago Creek (CCW) and Mahantango Creek (MCW) watersheds located in Pennsylvania. Topographic openness identified detailed topographic variation and critical source areas in the lower relief areas while flow accumulation was better at identifying concentrated flowpaths in higher relief areas. Results also indicated that concentrated flowpaths are prevalent across all four watersheds, reducing CP22 effective contributing areas by 78% in the TCW, 54% in the SCW, 38% in the CCW and 22% in the MCW. Thus, to improve surface water quality within the Chesapeake Bay Watershed, the implementation of riparian forest buffers should be done in such a way as to mitigate the effects of concentrated flowpaths that continue to short-circuit these buffers.<\/jats:p>","DOI":"10.3390\/rs10040614","type":"journal-article","created":{"date-parts":[[2018,4,18]],"date-time":"2018-04-18T03:51:13Z","timestamp":1524023473000},"page":"614","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":24,"title":["Evaluating Concentrated Flowpaths in Riparian Forest Buffer Contributing Areas Using LiDAR Imagery and Topographic Metrics"],"prefix":"10.3390","volume":"10","author":[{"ORCID":"https:\/\/orcid.org\/0000-0001-6267-747X","authenticated-orcid":false,"given":"Carlington W.","family":"Wallace","sequence":"first","affiliation":[{"name":"Interstate Commission on the Potomac River Basin, Rockville, MD 20850, USA"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-7064-7166","authenticated-orcid":false,"given":"Gregory","family":"McCarty","sequence":"additional","affiliation":[{"name":"Hydrology and Remote Sensing Laboratory, USDA-ARS, Beltsville, MD 20705, USA"}]},{"given":"Sangchul","family":"Lee","sequence":"additional","affiliation":[{"name":"Hydrology and Remote Sensing Laboratory, USDA-ARS, Beltsville, MD 20705, USA"},{"name":"Department of Environmental Science and Technology, University of Maryland, College Park, MD 20740, USA"}]},{"given":"Robert P.","family":"Brooks","sequence":"additional","affiliation":[{"name":"Department of Geography, The Pennsylvania State University, University Park, PA 16802, USA"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-7631-0214","authenticated-orcid":false,"given":"Tamie L.","family":"Veith","sequence":"additional","affiliation":[{"name":"Pasture Systems and Watershed Management Research Unit, USDA-ARS, University Park, PA 16802, USA"}]},{"given":"Peter J. A.","family":"Kleinman","sequence":"additional","affiliation":[{"name":"Pasture Systems and Watershed Management Research Unit, USDA-ARS, University Park, PA 16802, USA"}]},{"given":"Ali M.","family":"Sadeghi","sequence":"additional","affiliation":[{"name":"Hydrology and Remote Sensing Laboratory, USDA-ARS, Beltsville, MD 20705, USA"}]}],"member":"1968","published-online":{"date-parts":[[2018,4,17]]},"reference":[{"key":"ref_1","doi-asserted-by":"crossref","first-page":"857","DOI":"10.1111\/j.1752-1688.2010.00482.x","article-title":"Weighted regressions on time, discharge, and season (wrtds), with an application to Chesapeake Bay river inputs","volume":"46","author":"Hirsch","year":"2010","journal-title":"J. Am. Water Resour. Assoc."},{"key":"ref_2","doi-asserted-by":"crossref","first-page":"2453","DOI":"10.1016\/S1352-2310(98)00044-2","article-title":"Sources of nitrogen in wet deposition to the Chesapeake Bay region","volume":"32","author":"Russell","year":"1998","journal-title":"Atmos. Environ."},{"key":"ref_3","first-page":"24","article-title":"Sedimentary evidence for decreased heavy-metal inputs to the chesapeake bay","volume":"24","author":"Owens","year":"1995","journal-title":"Ambio"},{"key":"ref_4","doi-asserted-by":"crossref","first-page":"133","DOI":"10.2166\/wst.1995.0279","article-title":"The Chesapeake Bay story\u2014The science behind the program","volume":"31","author":"Shuyler","year":"1995","journal-title":"Water Sci. Technol."},{"key":"ref_5","doi-asserted-by":"crossref","first-page":"2723","DOI":"10.2166\/wst.1992.0373","article-title":"Chesapeake experience\u2014NPS Chesapeake challenge for sustainable development","volume":"26","author":"Bauereis","year":"1992","journal-title":"Water Sci. Technol."},{"key":"ref_6","doi-asserted-by":"crossref","first-page":"483","DOI":"10.1007\/s10661-010-1599-9","article-title":"An assessment of benthic condition in several small watersheds of the Chesapeake Bay, USA","volume":"176","author":"Leight","year":"2011","journal-title":"Environ. Monit. Assess."},{"key":"ref_7","doi-asserted-by":"crossref","first-page":"1191","DOI":"10.13031\/2013.6449","article-title":"BMP impacts on sediment and nutrient yields from an agricultural watershed in the Coastal Plain region","volume":"44","author":"Inamdar","year":"2001","journal-title":"Trans. ASAE"},{"unstructured":"Welsch, D.J. (1991). Riparian Forest Buffers: Function and Design for Protection and Enhancement of Water Resources.","key":"ref_8"},{"key":"ref_9","doi-asserted-by":"crossref","first-page":"55","DOI":"10.13031\/2013.13214","article-title":"Management effects on runoff and sediment transport in riparian forest buffers","volume":"42","author":"Sheridan","year":"1999","journal-title":"Trans. ASAE"},{"key":"ref_10","doi-asserted-by":"crossref","first-page":"1","DOI":"10.1080\/00224561.2003.12457491","article-title":"Sediment and nutrient removal in an established multi-species riparian buffer","volume":"58","author":"Lee","year":"2003","journal-title":"J. Soil Water Conserv."},{"key":"ref_11","doi-asserted-by":"crossref","first-page":"467","DOI":"10.2134\/jeq1993.00472425002200030010x","article-title":"Nutrient interception by a riparian forest receiving inputs from adjacent cropland","volume":"22","author":"Jordan","year":"1993","journal-title":"J. Environ. Qual."},{"key":"ref_12","doi-asserted-by":"crossref","first-page":"687","DOI":"10.1007\/s002679900060","article-title":"Water quality functions of riparian forest buffers in Chesapeake Bay watersheds","volume":"21","author":"Lowrance","year":"1997","journal-title":"Environ. Manag."},{"key":"ref_13","doi-asserted-by":"crossref","first-page":"149","DOI":"10.1016\/j.jhydrol.2004.11.017","article-title":"Hydrology of a first-order riparian zone and stream, Mid-Atlantic Coastal Plain, Maryland","volume":"309","author":"Angier","year":"2005","journal-title":"J. Hydrol."},{"key":"ref_14","doi-asserted-by":"crossref","first-page":"367","DOI":"10.1111\/j.1752-1688.2007.00153.x","article-title":"Variations in base-flow nitrate flux in a first-order stream and riparian zone","volume":"44","author":"Angier","year":"2008","journal-title":"J. Am. Water Resour. Assoc."},{"unstructured":"Shoemaker, R. (1989). The Conservation Reserve Program and Its Effect on Land Values.","key":"ref_15"},{"key":"ref_16","doi-asserted-by":"crossref","first-page":"336","DOI":"10.1080\/00224561.2002.12457463","article-title":"Assessment of concentrated flow through riparian buffers","volume":"57","author":"Dosskey","year":"2002","journal-title":"J. Soil Water Conserv."},{"key":"ref_17","doi-asserted-by":"crossref","first-page":"311","DOI":"10.1111\/j.1752-1688.2010.00422.x","article-title":"Ability of remnant riparian forests, with and without grass filters, to buffer concentrated surface runoff1","volume":"46","author":"Knight","year":"2010","journal-title":"J. Am. Water Resour. Assoc."},{"key":"ref_18","doi-asserted-by":"crossref","first-page":"919","DOI":"10.1111\/j.1752-1688.2000.tb04317.x","article-title":"Grass versus trees: Managing riparian areas to benefit streams of Central North America","volume":"36","author":"Lyons","year":"2000","journal-title":"J. Am. Water Resour. Assoc."},{"key":"ref_19","doi-asserted-by":"crossref","first-page":"1183","DOI":"10.2134\/jeq1995.00472425002400060019x","article-title":"Chemical movement in relation to tillage system and simulated rainfall intensity","volume":"24","author":"Myers","year":"1995","journal-title":"J. Environ. Qual."},{"key":"ref_20","first-page":"35","article-title":"Riparian forest buffers in agroecosystems\u2014Lessons learned from the Bear Creek watershed, Central Iowa, USA","volume":"63","author":"Schultz","year":"2004","journal-title":"Agrofor. Syst."},{"key":"ref_21","first-page":"1231","article-title":"Evaluation of vegetative filter strips as a best management practice for feed lots","volume":"60","author":"Dillaha","year":"1988","journal-title":"J. Water Pollut. Control Fed."},{"key":"ref_22","doi-asserted-by":"crossref","first-page":"513","DOI":"10.13031\/2013.31033","article-title":"Vegetative filter strips for agricultural nonpoint source pollution-control","volume":"32","author":"Dillaha","year":"1989","journal-title":"Trans. ASAE"},{"key":"ref_23","doi-asserted-by":"crossref","first-page":"246","DOI":"10.2136\/sssaj1996.03615995006000010037x","article-title":"Sediment and chemical load reduction by grass and riparian filters","volume":"60","author":"Daniels","year":"1996","journal-title":"Soil Sci. Soc. Am. J."},{"key":"ref_24","doi-asserted-by":"crossref","first-page":"191","DOI":"10.1007\/s10457-011-9457-5","article-title":"Concentrated flow paths in riparian buffer zones of Southern Illinois","volume":"84","author":"Pankau","year":"2012","journal-title":"Agrofor. Syst."},{"key":"ref_25","doi-asserted-by":"crossref","first-page":"1172","DOI":"10.2134\/jeq2006.0462","article-title":"Meta-analysis of nitrogen removal in riparian buffers","volume":"36","author":"Mayer","year":"2007","journal-title":"J. Environ. Qual."},{"key":"ref_26","doi-asserted-by":"crossref","first-page":"1200","DOI":"10.2134\/jeq2000.00472425002900040025x","article-title":"Multispecies riparian buffers trap sediment and nutrients during rainfall simulations","volume":"29","author":"Lee","year":"2000","journal-title":"J. Environ. Qual."},{"key":"ref_27","doi-asserted-by":"crossref","first-page":"1667","DOI":"10.2134\/jeq2007.0437","article-title":"Major factors influencing the efficacy of vegetated buffers on sediment trapping: A review and analysis","volume":"37","author":"Liu","year":"2008","journal-title":"J. Environ. Qual."},{"key":"ref_28","doi-asserted-by":"crossref","first-page":"1","DOI":"10.2134\/jeq2009.0001le","article-title":"Comment on \u201cMajor factors influencing the efficacy of vegetated buffers on sediment trapping: A review and analysis,\u201d By xingmei liu, xuyang zhang, and minghua zhang in the journal of environmental quality 2008 37:1667-1674","volume":"38","author":"Fox","year":"2009","journal-title":"J. Environ. Qual."},{"key":"ref_29","doi-asserted-by":"crossref","first-page":"1307","DOI":"10.1007\/s10980-012-9783-7","article-title":"Topographic placement of management practices in riparian zones to reduce water quality impacts from pastures","volume":"27","author":"Piechnik","year":"2012","journal-title":"Landsc. Ecol."},{"key":"ref_30","doi-asserted-by":"crossref","first-page":"96A","DOI":"10.1080\/00224561.2004.12435743","article-title":"The length we go\u2014Measuring environmental benefits of conservation practices","volume":"59","author":"Mausbach","year":"2004","journal-title":"J. Soil Water Conserv."},{"key":"ref_31","doi-asserted-by":"crossref","first-page":"51","DOI":"10.1016\/j.agwat.2017.02.014","article-title":"Quantifying the effects of conservation practice implementation on predicted runoff and chemical losses under climate change","volume":"186","author":"Wallace","year":"2017","journal-title":"Agric. Water Manag."},{"unstructured":"Walbridge, M.R., and Shafer, S.R. (2011, January 26\u201330). A long-term agroecosystem research (ltar) network for agriculture. Proceedings of the Fourth Interagency Conference on Research in the Watersheds, Fairbanks, AK, USA.","key":"ref_32"},{"unstructured":"USDA-NRCS (United States Department of Agriculture, N.R.C.S.) (2017, November 14). Official Soil Series Descriptions, Available online: https:\/\/soilseries.sc.egov.usda.gov\/osdlist.aspx.","key":"ref_33"},{"key":"ref_34","doi-asserted-by":"crossref","first-page":"261","DOI":"10.1016\/0037-0738(92)90045-S","article-title":"Seismic stratigraphy and coastal drainage patterns in the Quaternary section of the Southern Delmarva Peninsula, Virginia, USA","volume":"80","author":"Foyle","year":"1992","journal-title":"Sediment. Geol."},{"key":"ref_35","doi-asserted-by":"crossref","first-page":"461","DOI":"10.2489\/jswc.63.6.461","article-title":"Water quality and conservation practice effects in the Choptank River watershed","volume":"63","author":"McCarty","year":"2008","journal-title":"J. Soil Water Conserv."},{"key":"ref_36","doi-asserted-by":"crossref","first-page":"8","DOI":"10.1029\/2010WR010056","article-title":"US Department of Agriculture Agricultural Research Service Mahantango Creek watershed, Pennsylvania, United States: Physiography and history","volume":"47","author":"Bryant","year":"2011","journal-title":"Water Resour. Res."},{"unstructured":"White, K.E. (2001). Regional Curve Development and Selection of a Reference Reach in the Non-Urban, Lowland Sections of the Piedmont Physiographic Province, Pennsylvania and Maryland.","key":"ref_37"},{"key":"ref_38","doi-asserted-by":"crossref","first-page":"141","DOI":"10.1007\/s13157-012-0359-8","article-title":"Topographic metrics for improved mapping of forested wetlands","volume":"33","author":"Lang","year":"2013","journal-title":"Wetlands"},{"key":"ref_39","doi-asserted-by":"crossref","first-page":"1166","DOI":"10.1672\/08-197.1","article-title":"LiDAR intensity for improved detection of inundation below the forest canopy","volume":"29","author":"Lang","year":"2009","journal-title":"Wetlands"},{"key":"ref_40","doi-asserted-by":"crossref","first-page":"731","DOI":"10.1111\/j.1526-100X.2007.00285.x","article-title":"Responses to riparian restoration in the Spring Creek watershed, Central Pennsylvania","volume":"15","author":"Carline","year":"2007","journal-title":"Restor. Ecol."},{"key":"ref_41","doi-asserted-by":"crossref","first-page":"1991","DOI":"10.5194\/gmd-8-1991-2015","article-title":"System for Automated Geoscientific Analyses (SAGA) v. 2.1.4","volume":"8","author":"Conrad","year":"2015","journal-title":"Geosci. Model. Dev."},{"key":"ref_42","doi-asserted-by":"crossref","first-page":"222","DOI":"10.1016\/j.catena.2017.09.026","article-title":"Topographic metric predictions of soil redistribution and organic carbon in Iowa cropland fields","volume":"160","author":"Li","year":"2018","journal-title":"Catena"},{"key":"ref_43","first-page":"257","article-title":"Visualizing topography by openness: A new application of image processing to digital elevation models","volume":"68","author":"Yokoyama","year":"2002","journal-title":"Photogramm. Eng. Remote Sens."},{"key":"ref_44","doi-asserted-by":"crossref","first-page":"309","DOI":"10.1029\/96WR03137","article-title":"A new method for the determination of flow directions and upslope areas in grid digital elevation models","volume":"33","author":"Tarboton","year":"1997","journal-title":"Water Resour. Res."},{"doi-asserted-by":"crossref","unstructured":"Chu, H., Huang, M., Tain, Y., Yang, M., and Hofle, B. (2017). Historic low wall detection via topographic parameter images derived from fine-resolution dem. ISPRS Int. J. Geo-Inf., 6.","key":"ref_45","DOI":"10.3390\/ijgi6110346"},{"key":"ref_46","doi-asserted-by":"crossref","first-page":"373","DOI":"10.1016\/j.geomorph.2006.02.005","article-title":"Supervised landform classification of Northeast Honshu from dem-derived thematic maps","volume":"78","author":"Prima","year":"2006","journal-title":"Geomorphology"},{"key":"ref_47","doi-asserted-by":"crossref","first-page":"22","DOI":"10.1016\/j.geomorph.2009.12.005","article-title":"Characterization of volcanic geomorphology and geology by slope and topographic openness","volume":"118","author":"Prima","year":"2010","journal-title":"Geomorphology"},{"doi-asserted-by":"crossref","unstructured":"Inomata, T., Pinzon, F., Ranchos, J., Haraguchi, T., Nasu, H., Fernandez-Diaz, J., Aoyama, K., and Yonenobu, H. (2017). Archaeological application of airborne LiDAR with object-based vegetation classification and visualization techniques at the Lowland Maya site of Ceibal, Guatemala. Remote Sens., 9.","key":"ref_48","DOI":"10.3390\/rs9060563"},{"key":"ref_49","doi-asserted-by":"crossref","first-page":"41","DOI":"10.1016\/j.geoderma.2017.09.003","article-title":"Topographic and physicochemical controls on soil denitrification in prior converted croplands located on the Delmarva Peninsula, USA","volume":"309","author":"Li","year":"2018","journal-title":"Geoderma"},{"key":"ref_50","doi-asserted-by":"crossref","first-page":"446","DOI":"10.1016\/j.jhydrol.2004.07.043","article-title":"Modelling and managing critical source areas of diffuse pollution from agricultural land using flow connectivity simulation","volume":"304","author":"Heathwaite","year":"2005","journal-title":"J. Hydrol."},{"key":"ref_51","doi-asserted-by":"crossref","first-page":"381","DOI":"10.1016\/j.jenvman.2012.10.034","article-title":"Integrated watershed- and farm-scale modeling framework for targeting critical source areas while maintaining farm economic viability","volume":"114","author":"Ghebremichael","year":"2013","journal-title":"J. Environ. Manag."},{"key":"ref_52","doi-asserted-by":"crossref","first-page":"551","DOI":"10.1016\/j.agsy.2011.04.004","article-title":"Identifying and controlling critical sources of farm phosphorus imbalances for Vermont dairy farms","volume":"104","author":"Ghebremichael","year":"2011","journal-title":"Agric. Syst."},{"key":"ref_53","doi-asserted-by":"crossref","first-page":"137","DOI":"10.2134\/jeq1979.00472425000800010030x","article-title":"Drainage control to diminish nitrate loss from agricultural fields","volume":"8","author":"Gilliam","year":"1979","journal-title":"J. Environ. Qual."}],"container-title":["Remote Sensing"],"original-title":[],"language":"en","link":[{"URL":"https:\/\/www.mdpi.com\/2072-4292\/10\/4\/614\/pdf","content-type":"unspecified","content-version":"vor","intended-application":"similarity-checking"}],"deposited":{"date-parts":[[2025,10,11]],"date-time":"2025-10-11T15:01:01Z","timestamp":1760194861000},"score":1,"resource":{"primary":{"URL":"https:\/\/www.mdpi.com\/2072-4292\/10\/4\/614"}},"subtitle":[],"short-title":[],"issued":{"date-parts":[[2018,4,17]]},"references-count":53,"journal-issue":{"issue":"4","published-online":{"date-parts":[[2018,4]]}},"alternative-id":["rs10040614"],"URL":"https:\/\/doi.org\/10.3390\/rs10040614","relation":{},"ISSN":["2072-4292"],"issn-type":[{"type":"electronic","value":"2072-4292"}],"subject":[],"published":{"date-parts":[[2018,4,17]]}}}