Large Landscape Urban Irrigation: A Data‐Driven Approach to Evaluate Conservation Behavior
Keywords:modeling, planning and management, urban water conservation
Review of the Laws Establishing the SWRCB’s Permitting Authority over Appropriations of Groundwater Classified as Subterranean Streams and the SWRCB’s Implementation of those LawsAdd to Downloads
Review of the Laws Establishing the SWRCB’s Permitting Authority over Appropriations of Groundwater Classified as Subterranean Streams and the SWRCB’s Implementation of those LawsBerkeley Law Scholarship Repository | January 19, 2002...Summary
Introduction 1. A Brief Description of Groundwater: The Law and the Reality 2. Questions Addressed in this Report 3. Responses to the Questions...
1. A Brief Description of Groundwater: The Law and the Reality
2. Questions Addressed in this Report
3. Responses to the Questions Posed by the Board
Part I: The Legal Background of the Water Commission Act
1. The Pomeroy Case
2. The Pomeroy Case in its Historical Context
3. Doing the Job Pomeroy Failed to Do: Katz v. Walkinshaw and Los Angeles v. Hunter
Part II: The Statutory Response
1. The Water Commission Act of 1913
2. Subsequent Legislative Developments
Part III: The Board’s Current Implementation of the Law Governing Subterranean Streams Flowing Through Known and Definite Channels
1. Recent Board Decisions
a. Garrapata Creek
b. Draft Decision, Pauma and Pala Basins
2. Older Board Decisions
a. Sheep Creek, San Bernardino County
b. Stony Creek, Colusa County
c. Chorro and Morro Creeks, San Luis Obispo County
d. Tia Juana River, San Diego County
e. Carmel River, Monterey County
f. Sacramento River Groundwater Transfer, Yolo County
g. San Luis Rey River, San Diego County (Mission and Bonsall Basins)
Part IV: Groundwater Law in Other States
2. Other Western States
Part V: Management of Groundwater Outside Water Code § 1200
1. Overlying Uses of Groundwater
2. Other Sources of Authority Over Use of Groundwater
a. Constitution Article X, § 2, Water Code § 100, The Public Trust, and
Water Code § 275
b. Remedies for Impairment of Water Rights
Part VI: Should the Legal Test Be Changed?
A: Draft of Proposed Water Commission Bill
B-1: Assembly Bill No. 642 (1913) (as introduced Jan. 23, 1913).
B-2: Assembly Bill No. 642 (1913) (as amended in Senate May 10, 1913)
C: Water Commission Act of 1913
D: Transcripts of Hearings on Proposed Water Commission Bill
E: Memos from Technical Advisory Committee Members
Comparisons of Targeted-riffle and Reach-wide Benthic Macroinvertebrate Samples: Implications for Data Sharing in Stream-condition AssessmentsAdd to Downloads
Comparisons of Targeted-riffle and Reach-wide Benthic Macroinvertebrate Samples: Implications for Data Sharing in Stream-condition AssessmentsJournal of the North American Benthological Society | January 1, 2007...Summary
Recent comparisons of benthic macroinvertebrate (BMI) sampling protocols have shown that samples collected from different habitat types generally produce consistent stream classifications and...
Recent comparisons of benthic macroinvertebrate (BMI) sampling protocols have shown that samples collected from different habitat types generally produce consistent stream classifications and assessments. However, these comparisons usually have not included biological endpoints used by monitoring agencies, such as multimetric indices (e.g., benthic index of biotic integrity [B-IBI]) or observed- to-expected (O/E) indices of taxonomic completeness, as target variables, and estimates of method precision are rarely provided. Targeted-riffle (TR) and reach-wide (RW) benthic samples have been collected at thousands of sites across the western USA, but little guidance is available for understanding 1) the extent to which raw data sets can be combined in regional or large-scale analyses, 2) the degree of precision afforded by each method, or 3) the efficacy of cross-application of biological indicators derived from one sample type to the other. To address these issues, we used data from 193 sites in California where the Environmental Monitoring and Assessment Program (EMAP) collected the 2 samples side by side. We also conducted a separate study wherein 3 replicates of each sample type were collected from 15 streams to estimate minimum detectable difference (MDD) as a measure of each method’s precision. Metrics calculated from TR and RW samples showed similar dose–response relationships to stressors gradients and similar raw scoring ranges. Biological indices (B-IBI, O/E0, and O/E50) derived from RW samples were more precise than those derived from TR samples, but precision differences were not substantial. On average, pairwise differences in any index between TR and RW sample types were much less than the MDD associated with either sampling method. We observed a weak but consistent bias toward higher O/E50 scores from TR samples than from RW samples at the highest elevations and in the largest watersheds. Broad-scale condition assessments were nearly identical when B-IBI and O/E0 were used as endpoints, and assessments based on O/E50 were only slightly less similar. Our analyses indicate that raw data sets and biological indicators derived from TR and RW samples may be generally interchangeable when used in ambient biomonitoring programs.
Coupling a spatiotemporally distributed soil water budget with stream-depletion functions to inform stakeholder-driven management of groundwater-dependent ecosystems$0.00 Add to Downloads
Coupling a spatiotemporally distributed soil water budget with stream-depletion functions to inform stakeholder-driven management of groundwater-dependent ecosystemsWater Resources Research, American Geophysical Union | November 12, 2013...Summary
Groundwater pumping, even if only seasonal, may significantly impact groundwater-dependent ecosystems through increased streamflow depletion, particularly in semiarid and arid regions. The effects...
Groundwater pumping, even if only seasonal, may significantly impact groundwater-dependent ecosystems through increased streamflow depletion, particularly in semiarid and arid regions. The effects are exacerbated, under some conditions, by climate change. In social sciences, the management of groundwater-dependent ecosystems is generally considered a “wicked” problem due to the complexity of affected stakeholder groups, disconnected legal frameworks, and a divergence of policies and science at the cross road between groundwater and surface water, and between ecosystems and water quality.
A range of often simplified scientific tools plays an important role in addressing such problems. Here we develop a spatiotemporally distributed soil water budget model that we couple with an analytical model for stream depletion from groundwater pumping to rapidly assess seasonal impacts of groundwater pumping on streamflow during critical low flow periods.
We demonstrate the applicability of the tool for the Scott Valley in Northern California, where protected salmon depend on summer streamflow fed by cool groundwater. In this example, simulations suggest that increased recharge in the period immediately preceding the critical low streamflow season, and transfer of groundwater pumping away from the stream are potentially promising tools to address ecosystem concerns, albeit raising difficult infrastructure and water trading issues. In contrast, additional winter recharge at the expense of later spring recharge, whether intentional or driven by climate may reduce summer streamflows.
Comparison to existing detailed numerical groundwater model results suggests that the coupled soil water mass balance—stream depletion function approach provides a viable tool for scenario development among stakeholders, to constructively inform the search for potential solutions, and to direct more detailed, complex site-specific feasibility studies. The tool also identifies important field monitoring efforts needed to improve the understanding and quantification of site-specific groundwater-stream interactions.
The Public Trust Doctrine: Assessing Its Recent Past & Charting Its Future$0.00 Add to Downloads
The Public Trust Doctrine: Assessing Its Recent Past & Charting Its FutureUC Davis Law Review | January 1, 2012...Summary
For over four decades, the public trust doctrine has served as a foundational principle of modern environmental and natural resources law. This issue...For over four decades, the public trust doctrine has served as a foundational principle of modern environmental and natural resources law. This issue of the UC Davis Law Review , and the related, major symposium that drew a standing-room-only audience to King Hall in March 2011, demonstrate the continuing vitality of the public trust.The scholarship featured in these pages continues the UC Davis Law School’s leadership role concerning the doctrine, examines its recent development, and poses key questions regarding its future course.Much has been written about the public trust doctrine, and the articles in this volume explore many of its nuances and implications. Simply stated, however, the doctrine provides that certain natural resources are held by the government in a special status — in “trust” — for current and future generations. Government officials may neither alienate those resources into private ownership nor permit their injury or destruction. To the contrary, those officials have an affirmative, ongoing duty to safeguard the long-term preservation of those resources for the benefit of the general public.