The mechanisms of nutrient output through water flow from sloping farmland with slight rocky desertification in a karst region
Nutrient loss from sloping farmland with rocky desertification in karst regions leads to low farmland productivity and non-point source pollution. The mechanisms of nutrient outputs through water flow in such contexts under different rainfall intensities and slope angles were studied by using artifi...
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| Veröffentlicht in: | Environmental research letters 2020-09, Vol.15 (9), p.94085 |
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| creator | Gao, Ruxue Dai, Quanhou Gan, Yixian Yan, Youjin Peng, Xudong |
| description | Nutrient loss from sloping farmland with rocky desertification in karst regions leads to low farmland productivity and non-point source pollution. The mechanisms of nutrient outputs through water flow in such contexts under different rainfall intensities and slope angles were studied by using artificial rainfall simulation. Research showed that surface water flow occurred when the rainfall intensity was between 30 mm · h−1 and 50 mm · h−1, and the nutrient (TN, TP, TK) output through water flow showed the same pattern. Nutrient output through water flow was dominated by nutrient loss from surface and subsurface water flows when the rainfall intensity was ≥ 50 mm · h−1. Rainfall intensity was found to be a dominant driver in comparison to slope angle and for limestone soil of the karst region in Southwest China, but slope angle only had a significant effect on TP output through surface water flow. The largest proportion of nutrient output was associated with surface flow, a lower proportion was associated with subsurface flow, and the lowest proportion with underground flow. The nutrient output through underground water flow directly led to groundwater pollution, although it was not large. The results of this study provide a theoretical reference for the control of nutrient output through water flow and the management of nonpoint source pollution in karst regions. |
| doi_str_mv | 10.1088/1748-9326/ab9d3b |
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The mechanisms of nutrient outputs through water flow in such contexts under different rainfall intensities and slope angles were studied by using artificial rainfall simulation. Research showed that surface water flow occurred when the rainfall intensity was between 30 mm · h−1 and 50 mm · h−1, and the nutrient (TN, TP, TK) output through water flow showed the same pattern. Nutrient output through water flow was dominated by nutrient loss from surface and subsurface water flows when the rainfall intensity was ≥ 50 mm · h−1. Rainfall intensity was found to be a dominant driver in comparison to slope angle and for limestone soil of the karst region in Southwest China, but slope angle only had a significant effect on TP output through surface water flow. The largest proportion of nutrient output was associated with surface flow, a lower proportion was associated with subsurface flow, and the lowest proportion with underground flow. The nutrient output through underground water flow directly led to groundwater pollution, although it was not large. The results of this study provide a theoretical reference for the control of nutrient output through water flow and the management of nonpoint source pollution in karst regions.</description><identifier>ISSN: 1748-9326</identifier><identifier>EISSN: 1748-9326</identifier><identifier>DOI: 10.1088/1748-9326/ab9d3b</identifier><identifier>CODEN: ERLNAL</identifier><language>eng</language><publisher>Bristol: IOP Publishing</publisher><subject>Agricultural land ; Desertification ; Groundwater pollution ; Karst ; karst region ; Limestone ; Nonpoint source pollution ; Nutrient loss ; nutrient output through water flow ; Point source pollution ; Pollution sources ; Rainfall ; Rainfall intensity ; slope angle ; sloping farmland with slight rocky desertification ; Subsurface water ; Surface flow ; Surface water ; Water flow</subject><ispartof>Environmental research letters, 2020-09, Vol.15 (9), p.94085</ispartof><rights>2020 The Author(s). Published by IOP Publishing Ltd</rights><rights>Copyright IOP Publishing Sep 2020</rights><lds50>peer_reviewed</lds50><oa>free_for_read</oa><woscitedreferencessubscribed>false</woscitedreferencessubscribed><citedby>FETCH-LOGICAL-a510t-22fd2cc4248abae91712d99e7e206153b33a8cd1db35c6c822fd130de60fc83f3</citedby><cites>FETCH-LOGICAL-a510t-22fd2cc4248abae91712d99e7e206153b33a8cd1db35c6c822fd130de60fc83f3</cites></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><linktopdf>$$Uhttps://iopscience.iop.org/article/10.1088/1748-9326/ab9d3b/pdf$$EPDF$$P50$$Giop$$Hfree_for_read</linktopdf><link.rule.ids>314,776,780,860,2095,27903,27904,38847,38869,53819,53846</link.rule.ids></links><search><creatorcontrib>Gao, Ruxue</creatorcontrib><creatorcontrib>Dai, Quanhou</creatorcontrib><creatorcontrib>Gan, Yixian</creatorcontrib><creatorcontrib>Yan, Youjin</creatorcontrib><creatorcontrib>Peng, Xudong</creatorcontrib><title>The mechanisms of nutrient output through water flow from sloping farmland with slight rocky desertification in a karst region</title><title>Environmental research letters</title><addtitle>ERL</addtitle><addtitle>Environ. Res. Lett</addtitle><description>Nutrient loss from sloping farmland with rocky desertification in karst regions leads to low farmland productivity and non-point source pollution. The mechanisms of nutrient outputs through water flow in such contexts under different rainfall intensities and slope angles were studied by using artificial rainfall simulation. Research showed that surface water flow occurred when the rainfall intensity was between 30 mm · h−1 and 50 mm · h−1, and the nutrient (TN, TP, TK) output through water flow showed the same pattern. Nutrient output through water flow was dominated by nutrient loss from surface and subsurface water flows when the rainfall intensity was ≥ 50 mm · h−1. Rainfall intensity was found to be a dominant driver in comparison to slope angle and for limestone soil of the karst region in Southwest China, but slope angle only had a significant effect on TP output through surface water flow. The largest proportion of nutrient output was associated with surface flow, a lower proportion was associated with subsurface flow, and the lowest proportion with underground flow. The nutrient output through underground water flow directly led to groundwater pollution, although it was not large. The results of this study provide a theoretical reference for the control of nutrient output through water flow and the management of nonpoint source pollution in karst regions.</description><subject>Agricultural land</subject><subject>Desertification</subject><subject>Groundwater pollution</subject><subject>Karst</subject><subject>karst region</subject><subject>Limestone</subject><subject>Nonpoint source pollution</subject><subject>Nutrient loss</subject><subject>nutrient output through water flow</subject><subject>Point source pollution</subject><subject>Pollution sources</subject><subject>Rainfall</subject><subject>Rainfall intensity</subject><subject>slope angle</subject><subject>sloping farmland with slight rocky desertification</subject><subject>Subsurface water</subject><subject>Surface flow</subject><subject>Surface water</subject><subject>Water flow</subject><issn>1748-9326</issn><issn>1748-9326</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2020</creationdate><recordtype>article</recordtype><sourceid>O3W</sourceid><sourceid>ABUWG</sourceid><sourceid>AFKRA</sourceid><sourceid>AZQEC</sourceid><sourceid>BENPR</sourceid><sourceid>CCPQU</sourceid><sourceid>DWQXO</sourceid><sourceid>GNUQQ</sourceid><sourceid>DOA</sourceid><recordid>eNp1kUtv1TAQhS0EEuXCnqUlFmy41I84sZeo4lGpEpuytiZ-JL5N4mA7uuqG396EoNIFrMY6-ubMjA9Cbyn5SImUl7Sp5FFxVl9Cqyxvn6GLR-n5k_dL9CrnEyGiEo28QL9ue4dHZ3qYQh4zjh5PS0nBTQXHpcxLwaVPcel6fIbiEvZDPGOf4ojzEOcwddhDGgeYLD6H0q9q6PqCUzR399i67FIJPhgoIU44TBjwHaS8Aq5bldfohYchuzd_6gH9-PL59urb8eb71-urTzdHEJSUI2PeMmMqVklowSnaUGaVco1jpKaCt5yDNJbalgtTG7nxlBPrauKN5J4f0PXuayOc9JzCCOleRwj6txBTp2Fd1AxOt5QRabgTVIlK1RJMw0nLeCtbqP36tQf0bveaU_y5uFz0KS5pWtfXTEhGlZJCrRTZKZNizsn5x6mU6C0xvUWit0j0ntja8n5vCXH-6-nSoKnQShNVESn0bLdzPvyD_K_xA_h5p2A</recordid><startdate>20200901</startdate><enddate>20200901</enddate><creator>Gao, Ruxue</creator><creator>Dai, Quanhou</creator><creator>Gan, Yixian</creator><creator>Yan, Youjin</creator><creator>Peng, Xudong</creator><general>IOP Publishing</general><scope>O3W</scope><scope>TSCCA</scope><scope>AAYXX</scope><scope>CITATION</scope><scope>8FE</scope><scope>8FG</scope><scope>ABJCF</scope><scope>ABUWG</scope><scope>AEUYN</scope><scope>AFKRA</scope><scope>ATCPS</scope><scope>AZQEC</scope><scope>BENPR</scope><scope>BGLVJ</scope><scope>BHPHI</scope><scope>CCPQU</scope><scope>DWQXO</scope><scope>GNUQQ</scope><scope>HCIFZ</scope><scope>L6V</scope><scope>M7S</scope><scope>PATMY</scope><scope>PIMPY</scope><scope>PQEST</scope><scope>PQQKQ</scope><scope>PQUKI</scope><scope>PRINS</scope><scope>PTHSS</scope><scope>PYCSY</scope><scope>DOA</scope></search><sort><creationdate>20200901</creationdate><title>The mechanisms of nutrient output through water flow from sloping farmland with slight rocky desertification in a karst region</title><author>Gao, Ruxue ; Dai, Quanhou ; Gan, Yixian ; Yan, Youjin ; Peng, Xudong</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-a510t-22fd2cc4248abae91712d99e7e206153b33a8cd1db35c6c822fd130de60fc83f3</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2020</creationdate><topic>Agricultural land</topic><topic>Desertification</topic><topic>Groundwater pollution</topic><topic>Karst</topic><topic>karst region</topic><topic>Limestone</topic><topic>Nonpoint source pollution</topic><topic>Nutrient loss</topic><topic>nutrient output through water flow</topic><topic>Point source pollution</topic><topic>Pollution sources</topic><topic>Rainfall</topic><topic>Rainfall intensity</topic><topic>slope angle</topic><topic>sloping farmland with slight rocky desertification</topic><topic>Subsurface water</topic><topic>Surface flow</topic><topic>Surface water</topic><topic>Water flow</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Gao, Ruxue</creatorcontrib><creatorcontrib>Dai, Quanhou</creatorcontrib><creatorcontrib>Gan, Yixian</creatorcontrib><creatorcontrib>Yan, Youjin</creatorcontrib><creatorcontrib>Peng, Xudong</creatorcontrib><collection>IOP Publishing Free Content</collection><collection>IOPscience (Open Access)</collection><collection>CrossRef</collection><collection>ProQuest SciTech Collection</collection><collection>ProQuest Technology Collection</collection><collection>Materials Science & Engineering Collection</collection><collection>ProQuest Central (Alumni Edition)</collection><collection>ProQuest One Sustainability</collection><collection>ProQuest Central UK/Ireland</collection><collection>Agricultural & Environmental Science Collection</collection><collection>ProQuest Central Essentials</collection><collection>ProQuest Central</collection><collection>Technology Collection</collection><collection>Natural Science Collection</collection><collection>ProQuest One Community College</collection><collection>ProQuest Central Korea</collection><collection>ProQuest Central Student</collection><collection>SciTech Premium Collection</collection><collection>ProQuest Engineering Collection</collection><collection>Engineering Database</collection><collection>Environmental Science Database</collection><collection>Publicly Available Content Database</collection><collection>ProQuest One Academic Eastern Edition (DO NOT USE)</collection><collection>ProQuest One Academic</collection><collection>ProQuest One Academic UKI Edition</collection><collection>ProQuest Central China</collection><collection>Engineering Collection</collection><collection>Environmental Science Collection</collection><collection>DOAJ Directory of Open Access Journals</collection><jtitle>Environmental research letters</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Gao, Ruxue</au><au>Dai, Quanhou</au><au>Gan, Yixian</au><au>Yan, Youjin</au><au>Peng, Xudong</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>The mechanisms of nutrient output through water flow from sloping farmland with slight rocky desertification in a karst region</atitle><jtitle>Environmental research letters</jtitle><stitle>ERL</stitle><addtitle>Environ. Res. Lett</addtitle><date>2020-09-01</date><risdate>2020</risdate><volume>15</volume><issue>9</issue><spage>94085</spage><pages>94085-</pages><issn>1748-9326</issn><eissn>1748-9326</eissn><coden>ERLNAL</coden><abstract>Nutrient loss from sloping farmland with rocky desertification in karst regions leads to low farmland productivity and non-point source pollution. The mechanisms of nutrient outputs through water flow in such contexts under different rainfall intensities and slope angles were studied by using artificial rainfall simulation. Research showed that surface water flow occurred when the rainfall intensity was between 30 mm · h−1 and 50 mm · h−1, and the nutrient (TN, TP, TK) output through water flow showed the same pattern. Nutrient output through water flow was dominated by nutrient loss from surface and subsurface water flows when the rainfall intensity was ≥ 50 mm · h−1. Rainfall intensity was found to be a dominant driver in comparison to slope angle and for limestone soil of the karst region in Southwest China, but slope angle only had a significant effect on TP output through surface water flow. The largest proportion of nutrient output was associated with surface flow, a lower proportion was associated with subsurface flow, and the lowest proportion with underground flow. The nutrient output through underground water flow directly led to groundwater pollution, although it was not large. The results of this study provide a theoretical reference for the control of nutrient output through water flow and the management of nonpoint source pollution in karst regions.</abstract><cop>Bristol</cop><pub>IOP Publishing</pub><doi>10.1088/1748-9326/ab9d3b</doi><tpages>14</tpages><oa>free_for_read</oa></addata></record> |
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| subjects | Agricultural land Desertification Groundwater pollution Karst karst region Limestone Nonpoint source pollution Nutrient loss nutrient output through water flow Point source pollution Pollution sources Rainfall Rainfall intensity slope angle sloping farmland with slight rocky desertification Subsurface water Surface flow Surface water Water flow |
| title | The mechanisms of nutrient output through water flow from sloping farmland with slight rocky desertification in a karst region |
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