Comparing Futures for the Sacramento - San Joaquin Delta

Lund, Jay R.

doi:10.1525/california/9780520261976.001.0001

Cited by 127 publications

(170 citation statements)

References 6 publications

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“…A major consequence of subsidence is the increasing risk of levee failures that threaten the very farmland and water-conveyance systems the levees are maintained to protect (Mount and Twiss 2005;Florscheim and Dettinger 2007;Lund et al 2010;Suddeth 2010). Since 1930, there have been approximately 100 levee breaches (163 in the last 100 years).…”

Section: Implications For Greenhouse Gas Emission Reductions and Econmentioning

confidence: 99%

“…Since 1930, there have been approximately 100 levee breaches (163 in the last 100 years). The cumulative probability of levee failure on any island in the Delta was estimated to be 80% by 2050, with an over 90% probability of 10 islands failing simultaneously within the next 50 years (URS Corp & J. R. Benjamin Associates 2009; Lund et al 2010). Cultivation of peat soils in the Delta contributes disproportionately to GHG emissions in California relative to agriculture on low organic-matter soils (Hatala et al 2012;Li et al 2014;Knox et al 2015).…”

Section: Implications For Greenhouse Gas Emission Reductions and Econmentioning

confidence: 99%

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Implications for Greenhouse Gas Emission Reductions and Economics of a Changing Agricultural Mosaic in the Sacramento–San Joaquin Delta

Deverel¹,

Jacobs²,

Lucero³

et al. 2017

SFEWS

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We quantified the greenhouse-gas (GHG) emission and economic implications of alternative crop and wetland mosaics on a Sacramento-San Joaquin Delta island: Staten Island. Using existing GHG fluxes measurements for the Delta and biogeochemical models, we estimated GHG emissions for a range of scenarios, including the status quo, modified groundwater management, and incorporating rice and managed wetlands. For current land uses, emissions were predicted to vary greatly (48,000 to 105,000 t CO 2 -e yr -1 ) with varying groundwater depth. GHG emissions were highest when water depth was 120 cm, the typical depth for a Delta island, and lowest if water table depth was shallowest (60 cm). In the alternate land-use scenarios, we simulated wetlands and rice cultivation in areas of highest organic-matter soils, greatest subsidence, and GHG emissions. For each scenario, we analyzed economic implications for the land-owner by determining profit changes relative to the status quo. We spatially assigned areas for rice and wetlands, and then allowed the Delta Agricultural Production (DAP) model to optimize the allocation of other crops to maximize profit. The scenario that included wetlands decreased profits 79% relative to the status quo but reduced GHG emissions by 43,000 t CO 2 -e yr -1 (57% reduction). When mixtures of rice and wetlands were introduced, farm profits decreased 16%, and the GHG emission reduction was 33,000 t CO 2 -e yr -1 (44% reduction). When rice was cultivated on 38% of the island, profit increased 12% and emissions were 22,000 t CO 2 -e yr -1 lower than baseline emissions (30% reduction). Conversion to a mosaic of wetlands and crops including rice could substantially reduce overall GHG emissions of cultivated lands in the Delta without greatly affecting profitability.

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Section: Implications For Greenhouse Gas Emission Reductions and Econmentioning

confidence: 99%

Section: Implications For Greenhouse Gas Emission Reductions and Econmentioning

confidence: 99%

Implications for Greenhouse Gas Emission Reductions and Economics of a Changing Agricultural Mosaic in the Sacramento–San Joaquin Delta

Deverel¹,

Jacobs²,

Lucero³

et al. 2017

SFEWS

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“…Specifically, we examine the complex institutional system of water governance in the California Delta. This complex institutional system is an "ecology of games" where a diverse community of policy actors participates in multiple institutions to make decisions about sets of interconnected water issues (Lund 2010;Lubell 2015;Lubell et al, 2014). These multiple institutions are fragmented, with a high potential for decisions made in one institution to have negative or positive effects on other parts of the system (institutional externalities).…”

Section: Hypotheses For Environmental Governance and Collaborative Inmentioning

confidence: 99%

Two-mode brokerage in policy networks

Jasny

Lubell

2015

Social Networks

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Gould and Fernandez (1989) developed a widely used operationalization of brokerage for onemode networks. The basic idea of brokerage is that the central actor or 'broker' benefits from spanning the gap (or structural hole) between two disconnected parties. However, it is not always advantageous to limit the systems studied to only one mode. We develop an operationalization of two-mode brokerage in which we can classify the structures according the heterogeneity of the types of actors involved. We apply this conception to water policy networks in the San Joaquin-Sacramento River Delta in California where two-mode networks represent organizations participating in multiple policy institutions. The potential benefits of brokerage are high in these types of fragmented systems where multiple institutions and organizations are involved with policy decisions. Of particular interest is the role of collaborative institutions, which are hypothesized to broker the most heterogeneous structures. We use our two-mode version of brokerage to construct a scale of brokerage from most homogeneous to most heterogeneous. This scale lets us categorize both the role of these collaborative institutions as well as the importance of brokerage in the system overall.

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“…In addition, the Delta region is home to over 500,000 water users and over 750 species of flora and fauna (Hutton et al 1995). a freshwater tidal marshland (Hutton et al 1995;Lund et al 2010). By the end of the 1930s, channelization of the Delta created about 57 land masses-300,000 ha of reclaimed land for agricultural use known as the Delta islands-surrounded by water (Thompson 1957;Whipple et al 2012).…”

Section: Introductionmentioning

confidence: 99%