Assessing plot‐scale impacts of land use on overland flow generation in Central Panama
Land use in Panama has changed dramatically with ongoing deforestation and conversion to cropland and cattle pastures, potentially altering the soil properties that drive the hydrological processes of infiltration and overland flow. We compared plot‐scale overland flow generation between hillslopes...
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| Veröffentlicht in: | Hydrological processes 2020-12, Vol.34 (25), p.5043-5069 |
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| creator | Bush, Sidney A. Stallard, Robert F. Ebel, Brian A. Barnard, Holly R. |
| description | Land use in Panama has changed dramatically with ongoing deforestation and conversion to cropland and cattle pastures, potentially altering the soil properties that drive the hydrological processes of infiltration and overland flow. We compared plot‐scale overland flow generation between hillslopes in forested and actively cattle‐grazed watersheds in Central Panama. Soil physical and hydraulic properties, soil moisture and overland flow data were measured along hillslopes of each land‐use type. Soil characteristics and rainfall data were input into a simple, 1‐D representative model, HYDRUS‐1D, to simulate overland flow that we used to make inferences about overland flow response at forest and pasture sites. Runoff ratios (overland flow/rainfall) were generally higher at the pasture site, although no overall trends were observed between rainfall characteristics and runoff ratios across the two land uses at the plot scale. Saturated hydraulic conductivity (Ks) and bulk density were different between the forest and pasture sites (p |
| doi_str_mv | 10.1002/hyp.13924 |
| format | Article |
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Plot‐scale overland flow (OF) generation was compared between forested and pasture‐dominated watersheds in central Panama. Measured runoff ratios (overland flow/ rainfall) were higher at the pasture site than at the forest site. Measurements of saturated hydraulic conductivity and bulk density were different between the forest and pasture sites. Discrepancies in observed and HYDRUS‐1D‐simulated OF help inform differences in OF generation processes between land‐use types. At the plot scale, Hortonian overland flow is the main driver for OF at the pasture site during storms with high‐rainfall totals. We infer that the combination of a leaf litter layer and the activation of shallow preferential flow paths are likely the main drivers for plot‐scale OF generation at the forest site.</description><identifier>ISSN: 0885-6087</identifier><identifier>EISSN: 1099-1085</identifier><identifier>DOI: 10.1002/hyp.13924</identifier><language>eng</language><publisher>Hoboken, USA: John Wiley & Sons, Inc</publisher><subject>Agricultural land ; Bulk density ; Cattle ; Deforestation ; Flow paths ; Forests ; Freshwater ; Freshwater resources ; hillslope ; Hydraulic conductivity ; Hydraulic properties ; Hydrologic data ; Hydrologic processes ; Hydrology ; Inland water environment ; Land use ; Leaf litter ; Overland flow ; Pasture ; Preferential flow ; Rain ; Rainfall ; Rainfall data ; Ratios ; Runoff ; Saturation ; Soil characteristics ; Soil moisture ; Soil properties ; Storms ; Streams ; Surface runoff ; Tropical environments ; tropical hydrology ; Watersheds</subject><ispartof>Hydrological processes, 2020-12, Vol.34 (25), p.5043-5069</ispartof><rights>2020 John Wiley & Sons Ltd</rights><rights>2020 John Wiley & Sons, Ltd.</rights><lds50>peer_reviewed</lds50><oa>free_for_read</oa><woscitedreferencessubscribed>false</woscitedreferencessubscribed><citedby>FETCH-LOGICAL-c3324-3f3b030176a6b8e747b3aa1297e6d768012ca8e0566aa8b59ae2d187b486192c3</citedby><cites>FETCH-LOGICAL-c3324-3f3b030176a6b8e747b3aa1297e6d768012ca8e0566aa8b59ae2d187b486192c3</cites><orcidid>0000-0002-5413-3963 ; 0000-0001-8209-7608 ; 0000-0002-8359-7927 ; 0000-0003-1965-8542</orcidid></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><linktopdf>$$Uhttps://onlinelibrary.wiley.com/doi/pdf/10.1002%2Fhyp.13924$$EPDF$$P50$$Gwiley$$H</linktopdf><linktohtml>$$Uhttps://onlinelibrary.wiley.com/doi/full/10.1002%2Fhyp.13924$$EHTML$$P50$$Gwiley$$H</linktohtml><link.rule.ids>314,776,780,1411,27901,27902,45550,45551</link.rule.ids></links><search><creatorcontrib>Bush, Sidney A.</creatorcontrib><creatorcontrib>Stallard, Robert F.</creatorcontrib><creatorcontrib>Ebel, Brian A.</creatorcontrib><creatorcontrib>Barnard, Holly R.</creatorcontrib><title>Assessing plot‐scale impacts of land use on overland flow generation in Central Panama</title><title>Hydrological processes</title><description>Land use in Panama has changed dramatically with ongoing deforestation and conversion to cropland and cattle pastures, potentially altering the soil properties that drive the hydrological processes of infiltration and overland flow. We compared plot‐scale overland flow generation between hillslopes in forested and actively cattle‐grazed watersheds in Central Panama. Soil physical and hydraulic properties, soil moisture and overland flow data were measured along hillslopes of each land‐use type. Soil characteristics and rainfall data were input into a simple, 1‐D representative model, HYDRUS‐1D, to simulate overland flow that we used to make inferences about overland flow response at forest and pasture sites. Runoff ratios (overland flow/rainfall) were generally higher at the pasture site, although no overall trends were observed between rainfall characteristics and runoff ratios across the two land uses at the plot scale. Saturated hydraulic conductivity (Ks) and bulk density were different between the forest and pasture sites (p < 10−4). Simulating overland flow in HYDRUS‐1D produced more outputs similar to the overland flow recorded at the pasture site than the forest site. Results from our study indicate that, at the plot scale, Hortonian overland flow is the main driver for overland flow generation at the pasture site during storms with high‐rainfall totals. We infer that the combination of a leaf litter layer and the activation of shallow preferential flow paths resulting in shallow saturation‐excess overland flow are likely the main drivers for plot scale overland flow generation at the forest site. Results from this study contribute to the broader understanding of the delivery of freshwater to streams, which will become increasingly important in the tropics considering freshwater resource scarcity and changing storm intensities.
Plot‐scale overland flow (OF) generation was compared between forested and pasture‐dominated watersheds in central Panama. Measured runoff ratios (overland flow/ rainfall) were higher at the pasture site than at the forest site. Measurements of saturated hydraulic conductivity and bulk density were different between the forest and pasture sites. Discrepancies in observed and HYDRUS‐1D‐simulated OF help inform differences in OF generation processes between land‐use types. At the plot scale, Hortonian overland flow is the main driver for OF at the pasture site during storms with high‐rainfall totals. We infer that the combination of a leaf litter layer and the activation of shallow preferential flow paths are likely the main drivers for plot‐scale OF generation at the forest site.</description><subject>Agricultural land</subject><subject>Bulk density</subject><subject>Cattle</subject><subject>Deforestation</subject><subject>Flow paths</subject><subject>Forests</subject><subject>Freshwater</subject><subject>Freshwater resources</subject><subject>hillslope</subject><subject>Hydraulic conductivity</subject><subject>Hydraulic properties</subject><subject>Hydrologic data</subject><subject>Hydrologic processes</subject><subject>Hydrology</subject><subject>Inland water environment</subject><subject>Land use</subject><subject>Leaf litter</subject><subject>Overland flow</subject><subject>Pasture</subject><subject>Preferential flow</subject><subject>Rain</subject><subject>Rainfall</subject><subject>Rainfall data</subject><subject>Ratios</subject><subject>Runoff</subject><subject>Saturation</subject><subject>Soil characteristics</subject><subject>Soil moisture</subject><subject>Soil properties</subject><subject>Storms</subject><subject>Streams</subject><subject>Surface runoff</subject><subject>Tropical environments</subject><subject>tropical hydrology</subject><subject>Watersheds</subject><issn>0885-6087</issn><issn>1099-1085</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2020</creationdate><recordtype>article</recordtype><recordid>eNp1kM9Kw0AQhxdRsFYPvsGCJw9pZ_9kd3MsRa1Q0IOCnpZJuqkpaTbuppbefASf0Scxtl49DcN88_vBR8glgxED4OO3XTtiIuPyiAwYZFnCwKTHZADGpIkCo0_JWYwrAJBgYEBeJjG6GKtmSdvad9-fX7HA2tFq3WLRRepLWmOzoJvoqG-o_3Bhv5e139Kla1zAruoPVUOnrukC1vQRG1zjOTkpsY7u4m8OyfPtzdN0lswf7u6nk3lSCMFlIkqRgwCmFarcOC11LhAZz7RTC60MMF6gcZAqhWjyNEPHF8zoXBrFMl6IIbk65LbBv29c7OzKb0LTV1oulZESQIueuj5QRfAxBlfaNlRrDDvLwP6Ks704uxfXs-MDu61qt_sftLPXx8PHDwZ5b7E</recordid><startdate>20201215</startdate><enddate>20201215</enddate><creator>Bush, Sidney A.</creator><creator>Stallard, Robert F.</creator><creator>Ebel, Brian A.</creator><creator>Barnard, Holly R.</creator><general>John Wiley & Sons, Inc</general><general>Wiley Subscription Services, Inc</general><scope>AAYXX</scope><scope>CITATION</scope><scope>7QH</scope><scope>7ST</scope><scope>7TG</scope><scope>7UA</scope><scope>8FD</scope><scope>C1K</scope><scope>F1W</scope><scope>FR3</scope><scope>H96</scope><scope>KL.</scope><scope>KR7</scope><scope>L.G</scope><scope>SOI</scope><orcidid>https://orcid.org/0000-0002-5413-3963</orcidid><orcidid>https://orcid.org/0000-0001-8209-7608</orcidid><orcidid>https://orcid.org/0000-0002-8359-7927</orcidid><orcidid>https://orcid.org/0000-0003-1965-8542</orcidid></search><sort><creationdate>20201215</creationdate><title>Assessing plot‐scale impacts of land use on overland flow generation in Central Panama</title><author>Bush, Sidney A. ; Stallard, Robert F. ; Ebel, Brian A. ; Barnard, Holly R.</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c3324-3f3b030176a6b8e747b3aa1297e6d768012ca8e0566aa8b59ae2d187b486192c3</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2020</creationdate><topic>Agricultural land</topic><topic>Bulk density</topic><topic>Cattle</topic><topic>Deforestation</topic><topic>Flow paths</topic><topic>Forests</topic><topic>Freshwater</topic><topic>Freshwater resources</topic><topic>hillslope</topic><topic>Hydraulic conductivity</topic><topic>Hydraulic properties</topic><topic>Hydrologic data</topic><topic>Hydrologic processes</topic><topic>Hydrology</topic><topic>Inland water environment</topic><topic>Land use</topic><topic>Leaf litter</topic><topic>Overland flow</topic><topic>Pasture</topic><topic>Preferential flow</topic><topic>Rain</topic><topic>Rainfall</topic><topic>Rainfall data</topic><topic>Ratios</topic><topic>Runoff</topic><topic>Saturation</topic><topic>Soil characteristics</topic><topic>Soil moisture</topic><topic>Soil properties</topic><topic>Storms</topic><topic>Streams</topic><topic>Surface runoff</topic><topic>Tropical environments</topic><topic>tropical hydrology</topic><topic>Watersheds</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Bush, Sidney A.</creatorcontrib><creatorcontrib>Stallard, Robert F.</creatorcontrib><creatorcontrib>Ebel, Brian A.</creatorcontrib><creatorcontrib>Barnard, Holly R.</creatorcontrib><collection>CrossRef</collection><collection>Aqualine</collection><collection>Environment Abstracts</collection><collection>Meteorological & Geoastrophysical Abstracts</collection><collection>Water Resources Abstracts</collection><collection>Technology Research Database</collection><collection>Environmental Sciences and Pollution Management</collection><collection>ASFA: Aquatic Sciences and Fisheries Abstracts</collection><collection>Engineering Research Database</collection><collection>Aquatic Science & Fisheries Abstracts (ASFA) 2: Ocean Technology, Policy & Non-Living Resources</collection><collection>Meteorological & Geoastrophysical Abstracts - Academic</collection><collection>Civil Engineering Abstracts</collection><collection>Aquatic Science & Fisheries Abstracts (ASFA) Professional</collection><collection>Environment Abstracts</collection><jtitle>Hydrological processes</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Bush, Sidney A.</au><au>Stallard, Robert F.</au><au>Ebel, Brian A.</au><au>Barnard, Holly R.</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Assessing plot‐scale impacts of land use on overland flow generation in Central Panama</atitle><jtitle>Hydrological processes</jtitle><date>2020-12-15</date><risdate>2020</risdate><volume>34</volume><issue>25</issue><spage>5043</spage><epage>5069</epage><pages>5043-5069</pages><issn>0885-6087</issn><eissn>1099-1085</eissn><abstract>Land use in Panama has changed dramatically with ongoing deforestation and conversion to cropland and cattle pastures, potentially altering the soil properties that drive the hydrological processes of infiltration and overland flow. We compared plot‐scale overland flow generation between hillslopes in forested and actively cattle‐grazed watersheds in Central Panama. Soil physical and hydraulic properties, soil moisture and overland flow data were measured along hillslopes of each land‐use type. Soil characteristics and rainfall data were input into a simple, 1‐D representative model, HYDRUS‐1D, to simulate overland flow that we used to make inferences about overland flow response at forest and pasture sites. Runoff ratios (overland flow/rainfall) were generally higher at the pasture site, although no overall trends were observed between rainfall characteristics and runoff ratios across the two land uses at the plot scale. Saturated hydraulic conductivity (Ks) and bulk density were different between the forest and pasture sites (p < 10−4). Simulating overland flow in HYDRUS‐1D produced more outputs similar to the overland flow recorded at the pasture site than the forest site. Results from our study indicate that, at the plot scale, Hortonian overland flow is the main driver for overland flow generation at the pasture site during storms with high‐rainfall totals. We infer that the combination of a leaf litter layer and the activation of shallow preferential flow paths resulting in shallow saturation‐excess overland flow are likely the main drivers for plot scale overland flow generation at the forest site. Results from this study contribute to the broader understanding of the delivery of freshwater to streams, which will become increasingly important in the tropics considering freshwater resource scarcity and changing storm intensities.
Plot‐scale overland flow (OF) generation was compared between forested and pasture‐dominated watersheds in central Panama. Measured runoff ratios (overland flow/ rainfall) were higher at the pasture site than at the forest site. Measurements of saturated hydraulic conductivity and bulk density were different between the forest and pasture sites. Discrepancies in observed and HYDRUS‐1D‐simulated OF help inform differences in OF generation processes between land‐use types. At the plot scale, Hortonian overland flow is the main driver for OF at the pasture site during storms with high‐rainfall totals. We infer that the combination of a leaf litter layer and the activation of shallow preferential flow paths are likely the main drivers for plot‐scale OF generation at the forest site.</abstract><cop>Hoboken, USA</cop><pub>John Wiley & Sons, Inc</pub><doi>10.1002/hyp.13924</doi><tpages>27</tpages><orcidid>https://orcid.org/0000-0002-5413-3963</orcidid><orcidid>https://orcid.org/0000-0001-8209-7608</orcidid><orcidid>https://orcid.org/0000-0002-8359-7927</orcidid><orcidid>https://orcid.org/0000-0003-1965-8542</orcidid><oa>free_for_read</oa></addata></record> |
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| subjects | Agricultural land Bulk density Cattle Deforestation Flow paths Forests Freshwater Freshwater resources hillslope Hydraulic conductivity Hydraulic properties Hydrologic data Hydrologic processes Hydrology Inland water environment Land use Leaf litter Overland flow Pasture Preferential flow Rain Rainfall Rainfall data Ratios Runoff Saturation Soil characteristics Soil moisture Soil properties Storms Streams Surface runoff Tropical environments tropical hydrology Watersheds |
| title | Assessing plot‐scale impacts of land use on overland flow generation in Central Panama |
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