Concentrated flow paths in riparian buffer zones of southern Illinois

R. C. Pankau, J. E. Schoonover, K. W.J. Williard, P. J. Edwards

Research output: Contribution to journalArticle

24 Citations (Scopus)

Abstract

Riparian buffers in agricultural landscapes should be designed to trap pollutants in overland flow by slowing, filtering, and infiltrating surface runoff entering the buffer via sheet flow. However, observational evidence suggests that concentrated flow is prevalent from agricultural fields. Over time sediment can accumulate in riparian buffers forming berms that restrict sheet flow; these berms ultimately back up surface runoff, resulting in an eventual breakthrough that concentrates overland flow. This study examines the occurrence of concentrated flow paths (CFPs) in riparian buffers at both the field and watershed scale. At the field scale, intensive topographic surveys were conducted at ten field sites in southern Illinois. To assess the prevalence of CFPs at the watershed scale, three watersheds in southern Illinois were selected for walking stream surveys along randomly selected 1,000 m reaches. CFPs were identified in all topographic surveys and all walking stream surveys. Among field sites, concentrated flow accounted for 82. 5-100% of the drainage leaving the agricultural fields. Sediment berm accumulation was identified at all field sites and was positively correlated with CFP size. At the watershed scale, CFPs were more abundant in agricultural areas compared to forested land. Results from this study indicate that concentrated flow was prevalent across all study sites at both the field and watershed scale. Thus, surface water quality may suffer in areas with poorly functioning buffers, and managers must consider the occurrence of CFPs when designing and maintaining riparian buffers to protect stream water quality.

Original languageEnglish (US)
Pages (from-to)191-205
Number of pages15
JournalAgroforestry Systems
Volume84
Issue number2
DOIs
StatePublished - Feb 1 2012

Fingerprint

riparian buffers
riparian zone
buffer zone
watershed
sheet flow
overland flow
walking
agricultural land
runoff
water quality
buffers
berm
sediments
sediment
drainage
surface water
managers
traps
concentrates
pollutants

All Science Journal Classification (ASJC) codes

  • Forestry
  • Agronomy and Crop Science

Cite this

Pankau, R. C., Schoonover, J. E., Williard, K. W. J., & Edwards, P. J. (2012). Concentrated flow paths in riparian buffer zones of southern Illinois. Agroforestry Systems, 84(2), 191-205. https://doi.org/10.1007/s10457-011-9457-5
Pankau, R. C. ; Schoonover, J. E. ; Williard, K. W.J. ; Edwards, P. J. / Concentrated flow paths in riparian buffer zones of southern Illinois. In: Agroforestry Systems. 2012 ; Vol. 84, No. 2. pp. 191-205.
@article{0cf4c82e7c5d4db79875f8082f7c6ff9,
title = "Concentrated flow paths in riparian buffer zones of southern Illinois",
abstract = "Riparian buffers in agricultural landscapes should be designed to trap pollutants in overland flow by slowing, filtering, and infiltrating surface runoff entering the buffer via sheet flow. However, observational evidence suggests that concentrated flow is prevalent from agricultural fields. Over time sediment can accumulate in riparian buffers forming berms that restrict sheet flow; these berms ultimately back up surface runoff, resulting in an eventual breakthrough that concentrates overland flow. This study examines the occurrence of concentrated flow paths (CFPs) in riparian buffers at both the field and watershed scale. At the field scale, intensive topographic surveys were conducted at ten field sites in southern Illinois. To assess the prevalence of CFPs at the watershed scale, three watersheds in southern Illinois were selected for walking stream surveys along randomly selected 1,000 m reaches. CFPs were identified in all topographic surveys and all walking stream surveys. Among field sites, concentrated flow accounted for 82. 5-100{\%} of the drainage leaving the agricultural fields. Sediment berm accumulation was identified at all field sites and was positively correlated with CFP size. At the watershed scale, CFPs were more abundant in agricultural areas compared to forested land. Results from this study indicate that concentrated flow was prevalent across all study sites at both the field and watershed scale. Thus, surface water quality may suffer in areas with poorly functioning buffers, and managers must consider the occurrence of CFPs when designing and maintaining riparian buffers to protect stream water quality.",
author = "Pankau, {R. C.} and Schoonover, {J. E.} and Williard, {K. W.J.} and Edwards, {P. J.}",
year = "2012",
month = "2",
day = "1",
doi = "10.1007/s10457-011-9457-5",
language = "English (US)",
volume = "84",
pages = "191--205",
journal = "Agroforestry Systems",
issn = "0167-4366",
publisher = "Springer Netherlands",
number = "2",

}

Pankau, RC, Schoonover, JE, Williard, KWJ & Edwards, PJ 2012, 'Concentrated flow paths in riparian buffer zones of southern Illinois', Agroforestry Systems, vol. 84, no. 2, pp. 191-205. https://doi.org/10.1007/s10457-011-9457-5

Concentrated flow paths in riparian buffer zones of southern Illinois. / Pankau, R. C.; Schoonover, J. E.; Williard, K. W.J.; Edwards, P. J.

In: Agroforestry Systems, Vol. 84, No. 2, 01.02.2012, p. 191-205.

Research output: Contribution to journalArticle

TY - JOUR

T1 - Concentrated flow paths in riparian buffer zones of southern Illinois

AU - Pankau, R. C.

AU - Schoonover, J. E.

AU - Williard, K. W.J.

AU - Edwards, P. J.

PY - 2012/2/1

Y1 - 2012/2/1

N2 - Riparian buffers in agricultural landscapes should be designed to trap pollutants in overland flow by slowing, filtering, and infiltrating surface runoff entering the buffer via sheet flow. However, observational evidence suggests that concentrated flow is prevalent from agricultural fields. Over time sediment can accumulate in riparian buffers forming berms that restrict sheet flow; these berms ultimately back up surface runoff, resulting in an eventual breakthrough that concentrates overland flow. This study examines the occurrence of concentrated flow paths (CFPs) in riparian buffers at both the field and watershed scale. At the field scale, intensive topographic surveys were conducted at ten field sites in southern Illinois. To assess the prevalence of CFPs at the watershed scale, three watersheds in southern Illinois were selected for walking stream surveys along randomly selected 1,000 m reaches. CFPs were identified in all topographic surveys and all walking stream surveys. Among field sites, concentrated flow accounted for 82. 5-100% of the drainage leaving the agricultural fields. Sediment berm accumulation was identified at all field sites and was positively correlated with CFP size. At the watershed scale, CFPs were more abundant in agricultural areas compared to forested land. Results from this study indicate that concentrated flow was prevalent across all study sites at both the field and watershed scale. Thus, surface water quality may suffer in areas with poorly functioning buffers, and managers must consider the occurrence of CFPs when designing and maintaining riparian buffers to protect stream water quality.

AB - Riparian buffers in agricultural landscapes should be designed to trap pollutants in overland flow by slowing, filtering, and infiltrating surface runoff entering the buffer via sheet flow. However, observational evidence suggests that concentrated flow is prevalent from agricultural fields. Over time sediment can accumulate in riparian buffers forming berms that restrict sheet flow; these berms ultimately back up surface runoff, resulting in an eventual breakthrough that concentrates overland flow. This study examines the occurrence of concentrated flow paths (CFPs) in riparian buffers at both the field and watershed scale. At the field scale, intensive topographic surveys were conducted at ten field sites in southern Illinois. To assess the prevalence of CFPs at the watershed scale, three watersheds in southern Illinois were selected for walking stream surveys along randomly selected 1,000 m reaches. CFPs were identified in all topographic surveys and all walking stream surveys. Among field sites, concentrated flow accounted for 82. 5-100% of the drainage leaving the agricultural fields. Sediment berm accumulation was identified at all field sites and was positively correlated with CFP size. At the watershed scale, CFPs were more abundant in agricultural areas compared to forested land. Results from this study indicate that concentrated flow was prevalent across all study sites at both the field and watershed scale. Thus, surface water quality may suffer in areas with poorly functioning buffers, and managers must consider the occurrence of CFPs when designing and maintaining riparian buffers to protect stream water quality.

UR - http://www.scopus.com/inward/record.url?scp=84857048579&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=84857048579&partnerID=8YFLogxK

U2 - 10.1007/s10457-011-9457-5

DO - 10.1007/s10457-011-9457-5

M3 - Article

AN - SCOPUS:84857048579

VL - 84

SP - 191

EP - 205

JO - Agroforestry Systems

JF - Agroforestry Systems

SN - 0167-4366

IS - 2

ER -