Integrating active restoration with environmental flows to improve native riparian tree establishment in the Colorado River Delta

2017 ◽  
Vol 106 ◽  
pp. 661-674 ◽  
Author(s):  
Karen J. Schlatter ◽  
Matthew R. Grabau ◽  
Patrick B. Shafroth ◽  
Francisco Zamora-Arroyo
Keyword(s):  
Colorado River ◽  
Environmental Flows ◽  
River Delta ◽  
Tree Establishment ◽  
Colorado River Delta ◽  
Active Restoration ◽  
Riparian Tree

scholarly journals Leveraging environmental flows to reform water management policy: Lessons learned from the 2014 Colorado River Delta pulse flow

2017 ◽  
Vol 106 ◽  
pp. 683-694 ◽  
Author(s):  
Eloise Kendy ◽  
Karl W. Flessa ◽  
Karen J. Schlatter ◽  
Carlos A. de la Parra ◽  
Osvel M. Hinojosa Huerta ◽  
...  
Keyword(s):  
Water Management ◽  
Colorado River ◽  
Environmental Flows ◽  
Lessons Learned ◽  
River Delta ◽  
Management Policy ◽  
Colorado River Delta ◽  
Pulse Flow

Cultural and Recreational Values for Environmental Flows in Mexico's Colorado River Delta

2017 ◽  
Vol 03 (02) ◽  
pp. 1650035 ◽  
Author(s):  
Ashley Kerna ◽  
Bonnie Colby ◽  
Francisco Zamora
Keyword(s):  
Aquatic Ecosystems ◽  
Colorado River ◽  
Environmental Flows ◽  
Economic Value ◽  
Strong Support ◽  
Local Area ◽  
River Delta ◽  
Colorado River Delta ◽  
Total Economic Value ◽  
High Level

Worldwide, aquatic ecosystems subsist on water leftover from agricultural, industrial, and municipal water uses. While bi-national agreements have temporarily provided water for the Colorado River Delta (Delta) in Mexico, dedication of water to support aquatic ecosystems is rare. High-level U.S. – Mexico negotiations are underway to consider whether and how to provide water for the Delta once the current pilot program ends in 2017. Better understanding of the value of aquatic ecosystems can be useful in securing water to sustain them. This paper reports research findings on values held by visitors from nearby Mexican communities for environmental flows in the Delta. Based on surveys conducted at five recreation locations, this contingent valuation methodology (CVM) study assesses visitors' willingness-to-pay (WTP) for an assured source of water to sustain the Delta's ecosystem and the recreational opportunities it provides. Results indicate strong support for Delta restoration, with the majority of respondents indicating positive WTP to ensure adequate amounts of water to sustain a healthy and vibrant Delta ecosystem. Econometric model results indicate a median WTP ranging from $97 to $168 MXN (approximately $7–$13 USD at the time of analysis) per car per entry. These values represent only a subset of recreational users, and recreation values are only one of many components of the ecosystem services provided by the Delta. While only a fraction of recreation value and total economic value, it is important to understand values held by local recreation visitors. These values gauge support for preserving aquatic ecosystems in nearby communities. Furthermore, values held in the local area affect water management and policy decisions regarding restoration of this unique aquatic ecosystem.

Comparison of infiltration rates in the dry riverbed of the Colorado River Delta during environmental flows

2017 ◽  
Vol 106 ◽  
pp. 675-682 ◽  
Author(s):  
J. Eliana Rodríguez-Burgueño ◽  
Margaret Shanafield ◽  
Jorge Ramírez-Hernández
Keyword(s):  
Colorado River ◽  
Environmental Flows ◽  
River Delta ◽  
Colorado River Delta ◽  
Infiltration Rates

CONCENTRATION OF CONTAMINANTS IN BREEDING BIRD EGGS FROM THE COLORADO RIVER DELTA, MEXICO

2006 ◽  
Vol 25 (6) ◽  
pp. 1640 ◽  
Author(s):  
Jaqueline García-Hernández ◽  
Yelena V. Sapozhnikova ◽  
Daniel Schlenk ◽  
Andrew Z. Mason ◽  
Osvel Hinojosa-Huerta ◽  
...  
Keyword(s):  
Colorado River ◽  
River Delta ◽  
Colorado River Delta ◽  
Breeding Bird ◽  
Bird Eggs

scholarly journals “The Politics of Place”: Domestic and Diplomatic Priorities of the Colorado River Salinity Control Act (1974)

1999 ◽  
Vol 6 (1) ◽  
pp. 31
Author(s):  
Evan R. Ward
Keyword(s):  
River Water ◽  
River Basin ◽  
Colorado River ◽  
Environmental Politics ◽  
River Delta ◽  
Colorado River Basin ◽  
Colorado River Delta ◽  
Politics Of Place ◽  
Desalination Plant ◽  
Salinity Control

“The Politics of Place”: Domestic and Diplomatic Priorities of the Colorado River SalinityControl Act (1974)This article analyzes the Colorado River Salinity Control Act (1974) from international,regional (Colorado River Basin), and local (Yuma County) perspectives. While the Nixonadministration simply wanted appropriations to build a desalination plant near Yuma,Arizona, in order to respond to Mexican complaints of saline river water south of theborder, regional (U.S.) leaders used the legislation to obtain additional salinity controlmeasures that would ostensibly conserve the Colorado River Basin’s shrinking watersupply. The article also examines the efforts of farmers, municipal leaders, and Quechan natives in Yuma County to shape the legislation to their advantage.Keywords: Environmental politics, Colorado River Delta, Yuma County, U.S.-MexicanRelations, Quechan Indians, desalination

Hydrothermal mineralogy of calcareous sandstones from the Colorado River delta in the Cerro Prieto geothermal system, Baja California, Mexico

1985 ◽  
Vol 49 (352) ◽  
pp. 435-449 ◽  
Author(s):  
Peter Schiffman ◽  
Dennis K. Bird ◽  
Wilfred A. Elders
Keyword(s):  
Colorado River ◽  
Compositional Data ◽  
Local Equilibrium ◽  
River Delta ◽  
Geothermal System ◽  
Silicate Mineral ◽  
Colorado River Delta ◽  
Higher Temperature ◽  
Cerro Prieto ◽  
Hydrothermal Mineral

AbstractThe Cerro Prieto geothermal system provides a unique opportunity for the detailed study of calc-silicate mineral transitions between the diagenetic clay-carbonate and greenschist facies within the terrigenous sediments of the Colorado River delta. In this system, progressive devolatization reactions within carbonate-cemented, quartzofeldspathic sediment have produced a distinct hydrothermal mineral zonation at temperatures between 200–370°C and fluid pressures below 0.3 kbar. Descriptive and compositional data are presented for these minerals which include wairakite, epidote, prehnite, actinolite, clinopyroxene, garnet, sphene, biotite, microcline, and calcite. Partitioning of octahedral Fe, Mg, and Al between coexisting authigenic silicates is comparable with data from higher temperature metamorphic rocks and demonstrates an approach to local equilibrium within this system. Calculated fugacities of oxygen at temperatures above 300°C are (with rare exception) more reducing than that defined by the quartz-fayalite-magnetite buffer, a result consistent with the scarcity of hematite and grandite and the ubiquitous presence of organic material in Cerro Prieto sandstones.

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