Climate Drivers and Sources of Sediment and Organic Matter Fluxes in Intermittent Rivers and Ephemeral Streams (IRES) of a Subtropical Watershed, USA
Climate-driven hydrological models rarely incorporate intermittent rivers and ephemeral streams (IRES) due to monitoring difficulties and their perceived minor effect on river networks. Worldwide, IRES represent approximately 50% of river networks and up to 60% of annual flow and are recognized as c...
| Main Authors: | , , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
MDPI AG
2020-10-01
|
| Series: | Climate |
| Subjects: | |
| Online Access: | https://www.mdpi.com/2225-1154/8/10/117 |
| _version_ | 1797550744412356608 |
|---|---|
| author | Janet Dewey Jeff Hatten Byoungkoo Choi Clay Mangum Ying Ouyang |
| author_facet | Janet Dewey Jeff Hatten Byoungkoo Choi Clay Mangum Ying Ouyang |
| author_sort | Janet Dewey |
| collection | DOAJ |
| description | Climate-driven hydrological models rarely incorporate intermittent rivers and ephemeral streams (IRES) due to monitoring difficulties and their perceived minor effect on river networks. Worldwide, IRES represent approximately 50% of river networks and up to 60% of annual flow and are recognized as conduits and processors of organic matter (OM). Climate induced changes in precipitation and discharge (Q) may impact OM fluxes from IRES. We assessed storm-driven source and flux of total suspended solids (TSS) and OM from small IRES in Mississippi, USA. We used linear Pearson correlations to evaluate relationships between water and storm characteristics (e.g., discharge). Stepwise regression was used to predict change in flux. Dissolved OM was derived from saturated flow through soil whereas particulate OM was derived from channel extension during storms. A power log relationship between Q and materials flux indicated that Q was the driver for flux. A 5% increase in Q within IRES may result in flux increase of 2% TSS and 1.7–2.8% OM. Climate change projections of increased storm intensity over a shorter water year will increase channel extension and soil water transfer resulting in higher material flux to downstream reaches. Climate-driven hydrological models of OM flux should incorporate IRES. |
| first_indexed | 2024-03-10T15:34:45Z |
| format | Article |
| id | doaj.art-9c12e429093e4c5fa8fa16c978229bc3 |
| institution | Directory Open Access Journal |
| issn | 2225-1154 |
| language | English |
| last_indexed | 2024-03-10T15:34:45Z |
| publishDate | 2020-10-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Climate |
| spelling | doaj.art-9c12e429093e4c5fa8fa16c978229bc32023-11-20T17:21:31ZengMDPI AGClimate2225-11542020-10-0181011710.3390/cli8100117Climate Drivers and Sources of Sediment and Organic Matter Fluxes in Intermittent Rivers and Ephemeral Streams (IRES) of a Subtropical Watershed, USAJanet Dewey0Jeff Hatten1Byoungkoo Choi2Clay Mangum3Ying Ouyang4Geology and Geophysics Dept. 3006, University of Wyoming, 1000 E. University Ave, Laramie, WY 82071, USAForest Engineering, Resources & Management, Oregon State University, 280 Peavy Hall, Corvallis, OR 97333, USADepartment of Forest Environment Protection, Kangwon National University, Chuncheon 200-701, KoreaWeyerhaeuser NR Company, 406 Cole Rd., Hattiesburg, MS 39402, USAUSDA Forest Service, 775 Stone Blvd., Thompson Hall, MS 39762, USAClimate-driven hydrological models rarely incorporate intermittent rivers and ephemeral streams (IRES) due to monitoring difficulties and their perceived minor effect on river networks. Worldwide, IRES represent approximately 50% of river networks and up to 60% of annual flow and are recognized as conduits and processors of organic matter (OM). Climate induced changes in precipitation and discharge (Q) may impact OM fluxes from IRES. We assessed storm-driven source and flux of total suspended solids (TSS) and OM from small IRES in Mississippi, USA. We used linear Pearson correlations to evaluate relationships between water and storm characteristics (e.g., discharge). Stepwise regression was used to predict change in flux. Dissolved OM was derived from saturated flow through soil whereas particulate OM was derived from channel extension during storms. A power log relationship between Q and materials flux indicated that Q was the driver for flux. A 5% increase in Q within IRES may result in flux increase of 2% TSS and 1.7–2.8% OM. Climate change projections of increased storm intensity over a shorter water year will increase channel extension and soil water transfer resulting in higher material flux to downstream reaches. Climate-driven hydrological models of OM flux should incorporate IRES.https://www.mdpi.com/2225-1154/8/10/117climate changeIRESOMDOCPOCephemeral stream |
| spellingShingle | Janet Dewey Jeff Hatten Byoungkoo Choi Clay Mangum Ying Ouyang Climate Drivers and Sources of Sediment and Organic Matter Fluxes in Intermittent Rivers and Ephemeral Streams (IRES) of a Subtropical Watershed, USA Climate climate change IRES OM DOC POC ephemeral stream |
| title | Climate Drivers and Sources of Sediment and Organic Matter Fluxes in Intermittent Rivers and Ephemeral Streams (IRES) of a Subtropical Watershed, USA |
| title_full | Climate Drivers and Sources of Sediment and Organic Matter Fluxes in Intermittent Rivers and Ephemeral Streams (IRES) of a Subtropical Watershed, USA |
| title_fullStr | Climate Drivers and Sources of Sediment and Organic Matter Fluxes in Intermittent Rivers and Ephemeral Streams (IRES) of a Subtropical Watershed, USA |
| title_full_unstemmed | Climate Drivers and Sources of Sediment and Organic Matter Fluxes in Intermittent Rivers and Ephemeral Streams (IRES) of a Subtropical Watershed, USA |
| title_short | Climate Drivers and Sources of Sediment and Organic Matter Fluxes in Intermittent Rivers and Ephemeral Streams (IRES) of a Subtropical Watershed, USA |
| title_sort | climate drivers and sources of sediment and organic matter fluxes in intermittent rivers and ephemeral streams ires of a subtropical watershed usa |
| topic | climate change IRES OM DOC POC ephemeral stream |
| url | https://www.mdpi.com/2225-1154/8/10/117 |
| work_keys_str_mv | AT janetdewey climatedriversandsourcesofsedimentandorganicmatterfluxesinintermittentriversandephemeralstreamsiresofasubtropicalwatershedusa AT jeffhatten climatedriversandsourcesofsedimentandorganicmatterfluxesinintermittentriversandephemeralstreamsiresofasubtropicalwatershedusa AT byoungkoochoi climatedriversandsourcesofsedimentandorganicmatterfluxesinintermittentriversandephemeralstreamsiresofasubtropicalwatershedusa AT claymangum climatedriversandsourcesofsedimentandorganicmatterfluxesinintermittentriversandephemeralstreamsiresofasubtropicalwatershedusa AT yingouyang climatedriversandsourcesofsedimentandorganicmatterfluxesinintermittentriversandephemeralstreamsiresofasubtropicalwatershedusa |