Vegetation affects gully headcut erosion processes by regulating runoff hydrodynamics in the Loess tableland region
•Vegetation increased the Manning roughness coefficient and Darcy–Weisbach friction factor in the upstream area.•Vegetation can increase runoff shear stress of upstream area at small inflow discharge.•The influence of vegetation with clustered stems on roughness and runoff velocity was greater than...
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| Veröffentlicht in: | Journal of hydrology (Amsterdam) 2023-01, Vol.616, p.128769, Article 128769 |
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| creator | Lou, Yibao Wang, Wenlong Guo, Mingming Guo, Wenzhao Kang, Hongliang Feng, Lanqian Zhu, Yanan Yang, Hao |
| description | •Vegetation increased the Manning roughness coefficient and Darcy–Weisbach friction factor in the upstream area.•Vegetation can increase runoff shear stress of upstream area at small inflow discharge.•The influence of vegetation with clustered stems on roughness and runoff velocity was greater than that of vegetation with branched stems.•Vegetation treatments reduced the gully headcut soil loss by 31 to 81%.•The soil loss rate was positively correlated with runoff kinetic energy.
Vegetation plays an important role in gully headcut erosion processes. However, it is still unclear how vegetation in the upstream area affects gully headcut erosion processes by changing the hydraulics. A series of in situ inflow scouring experiments were conducted on bare land plots and vegetation plots (including the upstream area, headwall, and gully bed) planted with Bothriochloa ischaemum (BI), Agropyron cristatum (AC), and Medicago sativa (MS) with clustered stems and Artemisia gmelinii (AG) with erect stems to investigate the influence of vegetation on the hydrodynamic parameters involved in gully headcut erosion processes. The results showed that, compared with bare land, vegetation increased the Manning roughness coefficient (n) and Darcy–Weisbach friction factor (f) in the upstream area by 0.2–2.5 times and 0.9–9.6 times, respectively, but reduced the runoff velocity in the upstream area and gully brink. However, the jet flow velocity at entry into the plunge pool increased rapidly after passing through the gully head. The influence of vegetation with clustered stems on roughness and runoff velocity was greater than that of vegetation with branched stems. At 3.6 m3/h inflow discharge, vegetation can increase the runoff shear stress of the upstream area. The energy consumption of the gully head, upstream area, and gully bed accounted for 74 to 76 %, 19 to 21 %, and 4 to 7 % of the total energy consumption, respectively. The four vegetation treatments reduced the gully headcut soil loss by 31 to 81 %, among which MS exhibited the highest reduction. The soil loss rate was positively correlated with the jet flow velocity and its kinetic energy, and the correlation was the best (R2 of 0.934 and 0.935, respectively, P |
| doi_str_mv | 10.1016/j.jhydrol.2022.128769 |
| format | Article |
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Vegetation plays an important role in gully headcut erosion processes. However, it is still unclear how vegetation in the upstream area affects gully headcut erosion processes by changing the hydraulics. A series of in situ inflow scouring experiments were conducted on bare land plots and vegetation plots (including the upstream area, headwall, and gully bed) planted with Bothriochloa ischaemum (BI), Agropyron cristatum (AC), and Medicago sativa (MS) with clustered stems and Artemisia gmelinii (AG) with erect stems to investigate the influence of vegetation on the hydrodynamic parameters involved in gully headcut erosion processes. The results showed that, compared with bare land, vegetation increased the Manning roughness coefficient (n) and Darcy–Weisbach friction factor (f) in the upstream area by 0.2–2.5 times and 0.9–9.6 times, respectively, but reduced the runoff velocity in the upstream area and gully brink. However, the jet flow velocity at entry into the plunge pool increased rapidly after passing through the gully head. The influence of vegetation with clustered stems on roughness and runoff velocity was greater than that of vegetation with branched stems. At 3.6 m3/h inflow discharge, vegetation can increase the runoff shear stress of the upstream area. The energy consumption of the gully head, upstream area, and gully bed accounted for 74 to 76 %, 19 to 21 %, and 4 to 7 % of the total energy consumption, respectively. The four vegetation treatments reduced the gully headcut soil loss by 31 to 81 %, among which MS exhibited the highest reduction. The soil loss rate was positively correlated with the jet flow velocity and its kinetic energy, and the correlation was the best (R2 of 0.934 and 0.935, respectively, P < 0.01), presenting a logarithmic trend. These results are helpful to deepen the understanding of the roles of vegetation in regulating runoff hydraulic action during gully headcut erosion.</description><identifier>ISSN: 0022-1694</identifier><identifier>EISSN: 1879-2707</identifier><identifier>DOI: 10.1016/j.jhydrol.2022.128769</identifier><language>eng</language><publisher>Elsevier B.V</publisher><subject>Agropyron cristatum ; Artemisia gmelinii ; Bothriochloa ischaemum ; friction ; Gully headcut erosion ; Hydraulic characteristic ; hydrodynamics ; kinetic energy ; loess ; Medicago sativa ; roughness ; runoff ; shear stress ; soil erosion ; Soil loss ; Vegetation</subject><ispartof>Journal of hydrology (Amsterdam), 2023-01, Vol.616, p.128769, Article 128769</ispartof><rights>2022 Elsevier B.V.</rights><lds50>peer_reviewed</lds50><woscitedreferencessubscribed>false</woscitedreferencessubscribed><citedby>FETCH-LOGICAL-a365t-ada646f87e5339bdf4f9d15ee2318b67bc9a2e1d751692c5939888f996aa52f33</citedby><cites>FETCH-LOGICAL-a365t-ada646f87e5339bdf4f9d15ee2318b67bc9a2e1d751692c5939888f996aa52f33</cites></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><linktohtml>$$Uhttps://www.sciencedirect.com/science/article/pii/S0022169422013397$$EHTML$$P50$$Gelsevier$$H</linktohtml><link.rule.ids>314,776,780,3537,27901,27902,65306</link.rule.ids></links><search><creatorcontrib>Lou, Yibao</creatorcontrib><creatorcontrib>Wang, Wenlong</creatorcontrib><creatorcontrib>Guo, Mingming</creatorcontrib><creatorcontrib>Guo, Wenzhao</creatorcontrib><creatorcontrib>Kang, Hongliang</creatorcontrib><creatorcontrib>Feng, Lanqian</creatorcontrib><creatorcontrib>Zhu, Yanan</creatorcontrib><creatorcontrib>Yang, Hao</creatorcontrib><title>Vegetation affects gully headcut erosion processes by regulating runoff hydrodynamics in the Loess tableland region</title><title>Journal of hydrology (Amsterdam)</title><description>•Vegetation increased the Manning roughness coefficient and Darcy–Weisbach friction factor in the upstream area.•Vegetation can increase runoff shear stress of upstream area at small inflow discharge.•The influence of vegetation with clustered stems on roughness and runoff velocity was greater than that of vegetation with branched stems.•Vegetation treatments reduced the gully headcut soil loss by 31 to 81%.•The soil loss rate was positively correlated with runoff kinetic energy.
Vegetation plays an important role in gully headcut erosion processes. However, it is still unclear how vegetation in the upstream area affects gully headcut erosion processes by changing the hydraulics. A series of in situ inflow scouring experiments were conducted on bare land plots and vegetation plots (including the upstream area, headwall, and gully bed) planted with Bothriochloa ischaemum (BI), Agropyron cristatum (AC), and Medicago sativa (MS) with clustered stems and Artemisia gmelinii (AG) with erect stems to investigate the influence of vegetation on the hydrodynamic parameters involved in gully headcut erosion processes. The results showed that, compared with bare land, vegetation increased the Manning roughness coefficient (n) and Darcy–Weisbach friction factor (f) in the upstream area by 0.2–2.5 times and 0.9–9.6 times, respectively, but reduced the runoff velocity in the upstream area and gully brink. However, the jet flow velocity at entry into the plunge pool increased rapidly after passing through the gully head. The influence of vegetation with clustered stems on roughness and runoff velocity was greater than that of vegetation with branched stems. At 3.6 m3/h inflow discharge, vegetation can increase the runoff shear stress of the upstream area. The energy consumption of the gully head, upstream area, and gully bed accounted for 74 to 76 %, 19 to 21 %, and 4 to 7 % of the total energy consumption, respectively. The four vegetation treatments reduced the gully headcut soil loss by 31 to 81 %, among which MS exhibited the highest reduction. The soil loss rate was positively correlated with the jet flow velocity and its kinetic energy, and the correlation was the best (R2 of 0.934 and 0.935, respectively, P < 0.01), presenting a logarithmic trend. These results are helpful to deepen the understanding of the roles of vegetation in regulating runoff hydraulic action during gully headcut erosion.</description><subject>Agropyron cristatum</subject><subject>Artemisia gmelinii</subject><subject>Bothriochloa ischaemum</subject><subject>friction</subject><subject>Gully headcut erosion</subject><subject>Hydraulic characteristic</subject><subject>hydrodynamics</subject><subject>kinetic energy</subject><subject>loess</subject><subject>Medicago sativa</subject><subject>roughness</subject><subject>runoff</subject><subject>shear stress</subject><subject>soil erosion</subject><subject>Soil loss</subject><subject>Vegetation</subject><issn>0022-1694</issn><issn>1879-2707</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2023</creationdate><recordtype>article</recordtype><recordid>eNqFkE1PAyEYhInRxFr9CSYcvWxdYFngZEzjV9LEi3olLLy0NNvdCrsm---ltne5cHhnJjMPQrekXJCS1PfbxXYzudi3C1pSuiBUilqdoRmRQhVUlOIczcp8KUitqkt0ldK2zI-xaobSF6xhMEPoO2y8BzskvB7bdsIbMM6OA4bYp8N1H3sLKUHCzYQjZFF2dWscx673Hv81cFNndsEmHDo8bACv-uzAg2laaE3nDrYcdY0uvGkT3Jz-Ofp8fvpYvhar95e35eOqMKzmQ2GcqavaSwGcMdU4X3nlCAegjMimFo1VhgJxgudd1HLFlJTSK1Ubw6lnbI7ujrm5-vcIadC7kCy0uQr0Y9KMcCYrKbjIUn6U2rw2RfB6H8POxEmTUh8g660-QdYHyPoIOfsejj7IO34CRJ1sgM6CCzGz1K4P_yT8AtZUiyU</recordid><startdate>202301</startdate><enddate>202301</enddate><creator>Lou, Yibao</creator><creator>Wang, Wenlong</creator><creator>Guo, Mingming</creator><creator>Guo, Wenzhao</creator><creator>Kang, Hongliang</creator><creator>Feng, Lanqian</creator><creator>Zhu, Yanan</creator><creator>Yang, Hao</creator><general>Elsevier B.V</general><scope>AAYXX</scope><scope>CITATION</scope><scope>7S9</scope><scope>L.6</scope></search><sort><creationdate>202301</creationdate><title>Vegetation affects gully headcut erosion processes by regulating runoff hydrodynamics in the Loess tableland region</title><author>Lou, Yibao ; Wang, Wenlong ; Guo, Mingming ; Guo, Wenzhao ; Kang, Hongliang ; Feng, Lanqian ; Zhu, Yanan ; Yang, Hao</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-a365t-ada646f87e5339bdf4f9d15ee2318b67bc9a2e1d751692c5939888f996aa52f33</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2023</creationdate><topic>Agropyron cristatum</topic><topic>Artemisia gmelinii</topic><topic>Bothriochloa ischaemum</topic><topic>friction</topic><topic>Gully headcut erosion</topic><topic>Hydraulic characteristic</topic><topic>hydrodynamics</topic><topic>kinetic energy</topic><topic>loess</topic><topic>Medicago sativa</topic><topic>roughness</topic><topic>runoff</topic><topic>shear stress</topic><topic>soil erosion</topic><topic>Soil loss</topic><topic>Vegetation</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Lou, Yibao</creatorcontrib><creatorcontrib>Wang, Wenlong</creatorcontrib><creatorcontrib>Guo, Mingming</creatorcontrib><creatorcontrib>Guo, Wenzhao</creatorcontrib><creatorcontrib>Kang, Hongliang</creatorcontrib><creatorcontrib>Feng, Lanqian</creatorcontrib><creatorcontrib>Zhu, Yanan</creatorcontrib><creatorcontrib>Yang, Hao</creatorcontrib><collection>CrossRef</collection><collection>AGRICOLA</collection><collection>AGRICOLA - Academic</collection><jtitle>Journal of hydrology (Amsterdam)</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Lou, Yibao</au><au>Wang, Wenlong</au><au>Guo, Mingming</au><au>Guo, Wenzhao</au><au>Kang, Hongliang</au><au>Feng, Lanqian</au><au>Zhu, Yanan</au><au>Yang, Hao</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Vegetation affects gully headcut erosion processes by regulating runoff hydrodynamics in the Loess tableland region</atitle><jtitle>Journal of hydrology (Amsterdam)</jtitle><date>2023-01</date><risdate>2023</risdate><volume>616</volume><spage>128769</spage><pages>128769-</pages><artnum>128769</artnum><issn>0022-1694</issn><eissn>1879-2707</eissn><abstract>•Vegetation increased the Manning roughness coefficient and Darcy–Weisbach friction factor in the upstream area.•Vegetation can increase runoff shear stress of upstream area at small inflow discharge.•The influence of vegetation with clustered stems on roughness and runoff velocity was greater than that of vegetation with branched stems.•Vegetation treatments reduced the gully headcut soil loss by 31 to 81%.•The soil loss rate was positively correlated with runoff kinetic energy.
Vegetation plays an important role in gully headcut erosion processes. However, it is still unclear how vegetation in the upstream area affects gully headcut erosion processes by changing the hydraulics. A series of in situ inflow scouring experiments were conducted on bare land plots and vegetation plots (including the upstream area, headwall, and gully bed) planted with Bothriochloa ischaemum (BI), Agropyron cristatum (AC), and Medicago sativa (MS) with clustered stems and Artemisia gmelinii (AG) with erect stems to investigate the influence of vegetation on the hydrodynamic parameters involved in gully headcut erosion processes. The results showed that, compared with bare land, vegetation increased the Manning roughness coefficient (n) and Darcy–Weisbach friction factor (f) in the upstream area by 0.2–2.5 times and 0.9–9.6 times, respectively, but reduced the runoff velocity in the upstream area and gully brink. However, the jet flow velocity at entry into the plunge pool increased rapidly after passing through the gully head. The influence of vegetation with clustered stems on roughness and runoff velocity was greater than that of vegetation with branched stems. At 3.6 m3/h inflow discharge, vegetation can increase the runoff shear stress of the upstream area. The energy consumption of the gully head, upstream area, and gully bed accounted for 74 to 76 %, 19 to 21 %, and 4 to 7 % of the total energy consumption, respectively. The four vegetation treatments reduced the gully headcut soil loss by 31 to 81 %, among which MS exhibited the highest reduction. The soil loss rate was positively correlated with the jet flow velocity and its kinetic energy, and the correlation was the best (R2 of 0.934 and 0.935, respectively, P < 0.01), presenting a logarithmic trend. These results are helpful to deepen the understanding of the roles of vegetation in regulating runoff hydraulic action during gully headcut erosion.</abstract><pub>Elsevier B.V</pub><doi>10.1016/j.jhydrol.2022.128769</doi></addata></record> |
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| subjects | Agropyron cristatum Artemisia gmelinii Bothriochloa ischaemum friction Gully headcut erosion Hydraulic characteristic hydrodynamics kinetic energy loess Medicago sativa roughness runoff shear stress soil erosion Soil loss Vegetation |
| title | Vegetation affects gully headcut erosion processes by regulating runoff hydrodynamics in the Loess tableland region |
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