Simulation of Subsidence Mitigation Effects on Island Drain Flow, Seepage, and Organic Carbon Loads on Subsided Islands Sacramento–San Joaquin Delta
https://doi.org/10.15447/sfews.2017v15iss4art2 In light of desired implementation of subsidence mitigation practices on Delta islands and perceived need for evaluation tools, we developed groundwater and solute transport models and we attempted to answer the following questions. 1. How do the ground...
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ftdoajarticles:oai:doaj.org/article:aabaa20846af45de882d651a91113f43 2023-05-15T16:00:31+02:00 Simulation of Subsidence Mitigation Effects on Island Drain Flow, Seepage, and Organic Carbon Loads on Subsided Islands Sacramento–San Joaquin Delta Steven J. Deverel David A. Leighton Christina Lucero Timothy Ingrum 2017-12-01T00:00:00Z https://doaj.org/article/aabaa20846af45de882d651a91113f43 EN eng eScholarship Publishing, University of California http://escholarship.org/uc/item/4q340190 https://doaj.org/toc/1546-2366 1546-2366 https://doaj.org/article/aabaa20846af45de882d651a91113f43 San Francisco Estuary and Watershed Science, Vol 15, Iss 4 (2017) subsidence sustainability groundwater water quality Environmental sciences GE1-350 article 2017 ftdoajarticles 2022-12-31T14:45:54Z https://doi.org/10.15447/sfews.2017v15iss4art2 In light of desired implementation of subsidence mitigation practices on Delta islands and perceived need for evaluation tools, we developed groundwater and solute transport models and we attempted to answer the following questions. 1. How do the groundwater flow and drainage systems interact to influence island drainage volumes and drain dissolved organic carbon (DOC) concentrations and loads? 2. How will future subsidence impact drainage volumes and loads and seepage onto islands? 3. How will land-use changes to mitigate subsidence affect seepage and drain flow and loads? 4. How can water-quality impacts from drainage and restoration and rice cultivation on Delta islands be minimized? We utilized hydrologic and geochemical data and modeling to answer these questions. Subsided Delta island hydrology is dominated by subsurface processes. Seepage and siphoned irrigation water recharge groundwater which flows to drains. Drainage water containing DOC derived from oxidation of organic soils is discharged to adjacent channels. We analyzed the effects of subsidence mitigation through simulation of mosaics of rice and palustrine wetlands with varying hydrologic management on a representative subsided island (Twitchell Island). These alternative land uses reduce seepage onto islands and thus contribute to increased levee stability. However, most scenarios resulted in increased drain flow and DOC loads. Reducing drain flow is essential to reducing DOC loads relative to the business-as-usual scenario and can be accomplished through hydrologic controls that reduce drain flow on the islands. Article in Journal/Newspaper Delta Island Directory of Open Access Journals: DOAJ Articles |
institution |
Open Polar |
collection |
Directory of Open Access Journals: DOAJ Articles |
op_collection_id |
ftdoajarticles |
language |
English |
topic |
subsidence sustainability groundwater water quality Environmental sciences GE1-350 |
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subsidence sustainability groundwater water quality Environmental sciences GE1-350 Steven J. Deverel David A. Leighton Christina Lucero Timothy Ingrum Simulation of Subsidence Mitigation Effects on Island Drain Flow, Seepage, and Organic Carbon Loads on Subsided Islands Sacramento–San Joaquin Delta |
topic_facet |
subsidence sustainability groundwater water quality Environmental sciences GE1-350 |
description |
https://doi.org/10.15447/sfews.2017v15iss4art2 In light of desired implementation of subsidence mitigation practices on Delta islands and perceived need for evaluation tools, we developed groundwater and solute transport models and we attempted to answer the following questions. 1. How do the groundwater flow and drainage systems interact to influence island drainage volumes and drain dissolved organic carbon (DOC) concentrations and loads? 2. How will future subsidence impact drainage volumes and loads and seepage onto islands? 3. How will land-use changes to mitigate subsidence affect seepage and drain flow and loads? 4. How can water-quality impacts from drainage and restoration and rice cultivation on Delta islands be minimized? We utilized hydrologic and geochemical data and modeling to answer these questions. Subsided Delta island hydrology is dominated by subsurface processes. Seepage and siphoned irrigation water recharge groundwater which flows to drains. Drainage water containing DOC derived from oxidation of organic soils is discharged to adjacent channels. We analyzed the effects of subsidence mitigation through simulation of mosaics of rice and palustrine wetlands with varying hydrologic management on a representative subsided island (Twitchell Island). These alternative land uses reduce seepage onto islands and thus contribute to increased levee stability. However, most scenarios resulted in increased drain flow and DOC loads. Reducing drain flow is essential to reducing DOC loads relative to the business-as-usual scenario and can be accomplished through hydrologic controls that reduce drain flow on the islands. |
format |
Article in Journal/Newspaper |
author |
Steven J. Deverel David A. Leighton Christina Lucero Timothy Ingrum |
author_facet |
Steven J. Deverel David A. Leighton Christina Lucero Timothy Ingrum |
author_sort |
Steven J. Deverel |
title |
Simulation of Subsidence Mitigation Effects on Island Drain Flow, Seepage, and Organic Carbon Loads on Subsided Islands Sacramento–San Joaquin Delta |
title_short |
Simulation of Subsidence Mitigation Effects on Island Drain Flow, Seepage, and Organic Carbon Loads on Subsided Islands Sacramento–San Joaquin Delta |
title_full |
Simulation of Subsidence Mitigation Effects on Island Drain Flow, Seepage, and Organic Carbon Loads on Subsided Islands Sacramento–San Joaquin Delta |
title_fullStr |
Simulation of Subsidence Mitigation Effects on Island Drain Flow, Seepage, and Organic Carbon Loads on Subsided Islands Sacramento–San Joaquin Delta |
title_full_unstemmed |
Simulation of Subsidence Mitigation Effects on Island Drain Flow, Seepage, and Organic Carbon Loads on Subsided Islands Sacramento–San Joaquin Delta |
title_sort |
simulation of subsidence mitigation effects on island drain flow, seepage, and organic carbon loads on subsided islands sacramento–san joaquin delta |
publisher |
eScholarship Publishing, University of California |
publishDate |
2017 |
url |
https://doaj.org/article/aabaa20846af45de882d651a91113f43 |
genre |
Delta Island |
genre_facet |
Delta Island |
op_source |
San Francisco Estuary and Watershed Science, Vol 15, Iss 4 (2017) |
op_relation |
http://escholarship.org/uc/item/4q340190 https://doaj.org/toc/1546-2366 1546-2366 https://doaj.org/article/aabaa20846af45de882d651a91113f43 |
_version_ |
1766396502814490624 |