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This week’s featured articles …
DELTA STEWARDSHIP COUNCIL: A Study Comparing Ways to Estimate Crop Evapotranspiration in the Delta
The Delta Watermaster leads a panel discussing a recent study that compared 7 different methods for estimating consumptive use of crops grown in the Delta
At the May meeting of the Delta Stewardship Council, Delta Watermaster Michael George discussed the recently completed study: A Comparative Study for Estimating Crop Evapotranspiration in the Delta which compared seven different models and methods of estimating the consumptive use of different crops grown on the Delta’s numerous islands. Considering that agriculture accounts for the vast majority of land use within the Delta, the consumptive use or evapotranspiration of crops grown there is important for managing water as it flows in and through the Delta’s channels, the hub of California’s water system.
The Delta is both a transfer point for water stored in reservoirs on upstream tributaries and a source of otherwise free-flowing water for in-Delta water-rights holders. While the amount of water diverted from the Delta by the State and federal water projects is well known, less is known about the amount of water taken and consumptively used (meaning not otherwise returned to the Delta in forms such as waste flow or runoff) by local in-Delta diverters. This consumptive use is measured as evapotranspiration, which is defined by the USGS generally as the water lost to the atmosphere from the ground surface, evaporation from the capillary fringe of the groundwater table, and the transpiration of groundwater by plants whose roots tap the capillary fringe of the groundwater table.
Given the State’s system of cascading water rights in which upstream return flows are factored into downstream water rights, measuring and understanding consumptive use within the Delta is important not only to farmers but also to water facility managers, water rights regulators, and to those seeking to protect the Delta’s human and natural ecosystem.
In water news this week from around the web …
WEEKEND DAILY DIGEST: California drinking water tax dies in budget compromise; Radio show: Sneak Attack On Environmental Laws Shoved Into Spending Bill; Radio show: Twin tunnels $11 billion water project up for re-vote after backroom dealing revealed; Federal legislation introduced to ensure access to clean affordable water for working families; Drought: Cataclysms were predictable for 1,000 years; that’s changing; EPA: Gina McCarthy’s portrait is done. Pruitt hasn’t hung it up; The science behind the space images of waterways seen on Google Earth; and more … READ IT HERE: Weekend Daily Digest
MONDAY: How the Yurok Tribe is reclaiming the Klamath River; Dozens of water systems consolidate in California’s farming heartland; Klamath Water Users Association: Court should move Tribes case READ IT HERE: Monday’s Daily Digest
TUESDAY: L.A. is doing water better than your city. Yes, that L.A.; Clean streams key to aiding recovery of endangered frogs; Carbon farming works. Can it scale up in time?; CA turn to US for money that environmental groups say doesn’t go far enough; Conservationists see winning issue in Trump era; Toxic chemicals in plastic pollution littering freshwater habitats; and more … READ IT HERE: Tuesday’s Daily Digest
WEDNESDAY: Federal report cites ‘insider security risk’ at critical Western dams; Folsom, Shasta among dams at risk of ‘insider threats’; Bill aims to combat derelict freighters, trawlers and barges littering the Delta; South Napa earthquake linked to summer groundwater dip; Foresters welcome potentially larger harvest; Measure splitting California into three states qualifies for November ballot; Column: The never-ending effort to dismember California continues to never end; and more … READ IT HERE: Wednesday’s Daily Digest
THURSDAY: Controversial Cal Water Fix bill on the table; Suit says state council favored twin tunnels over restoring the Delta; Record-low clarity in Lake Tahoe blamed on unusual weather events; Study says 2014 Napa quake may be linked to groundwater changes; New water law raises questions, anxiety; U.S. groups sue Trump administration over water protections; Senate eyes floor action on energy-water bill, recissions; and more … READ IT HERE: Thursday’s Daily Digest
FRIDAY: Senators insist on judicial review of water tunnels project; DWR expands on response to forensics report; DWR may appeal ruling on Butte DA’s lawsuit; Martins Beach: Surfers tell Supreme Court billionaire Vinod Khosla has no right to block public from shoreline; Scott Pruitt, under fire, plans to initiate a big environmental rollback; Trump’s move to redefine water rule threatens wetland banks; Lawsuit challenges Trump administration push to slash protections for waterways, wetlands; What will be the leading edge water solutions of the 21st century?; and more … READ IT HERE: Friday’s Daily Digest
This week’s breaking news …
- THIS JUST IN … California Water Fix Administrative Draft Supplemental Environmental Review Documents Posted Online (Tuesday)
- THIS JUST IN … California drinking water tax dies in budget compromise; Legislature committed to continuing the conversation over the summer (Friday pm)
Weekly features …
- RESERVOIR AND WATER CONDITIONS for June 11, 2018
- BLOG ROUND-UP: Defending the need for food and water, water meetings, Delta tunnels revote, SGMA and DACs, Drought and climate change, Winter-run salmon, and more …
- SCIENCE NEWS: Unprecedented weather in 2017 hurts clarity level in Lake Tahoe; South Napa earthquake linked to summer groundwater dip; What’s still threatening coastal California condors?; Toxic chemicals in plastic pollution littering freshwater habitats; and more …
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