국가지하수정보센터
빅데이터플랫폼기술동향
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[기술동향] [미국] 경사 관정 활용하는 모델링 거절
[미국] 경사 관정 활용하는 모델링 거절
환경단체인 Orange County Coastkeeper에 따르면 취수 시스템의 설치 이전에 제안된 헌팅턴비치(Huntington Beach)의 담수화 플랜트 건설이 거절되었다. Coastkeeper는 경사 관정에서 지하수를 최소한으로 활용하면서 최대 하루 430Ml 규모로 해수를 취수할 수 있다는 점을 발견했다. 이는 지난 2014년 전문위원회에 의해 최초계획 시 비판을 받았다.
“새로운 모델링을 활용하면 경사 관정을 통해 플랜트 가동 시 생산되는 물의 취수가 가능하다”고 Coastkeeper의 연구 책임자 Ray Hiemstra는 말했다.
[원문내용]
Rejected slant well could work
A water intake system previously rejected for a proposed desalination plant at Huntington Beach could be viable if it is used differently, according to environmental organisation, Orange County Coastkeeper.
Coastkeeper\'s finding suggest that the slant wells could intake seawater at up to 430 Ml/d while minimizing the amount of groundwater uptake - a key fault found with the original design by an expert panel in 2014. "Using the new modeling, slant well intakes could produce the amount of water to run the plant," said associate director of Coastkeeper, Ray Hiemstra.
The California Coastal Commission and plant builder Poseidon Water who formed the expert panel subsequently put together another one to carry out further studies on slant well design. That panel has recently published its conclusions that include the new modelling.The panel\'s memo on its findings said that aligning the intake differently and reducing the pumping rate would significantly lower the draw on the Orange County Water District\'s groundwater basin. "Ratio varies from 8% from [the groundwater basin] to about 36%," said Hiemstra.
Poseidon currently intends to use the open-water intakes of a neighboring AES gas-fired power station.
Coastkeeper have in insisted that Poseidon use a subsurface intake with the sand acting as a filter which Coastkeeper and other environmentalists says would be less detrimental to marine life.
Poseidon vice president, Scott Maloni, said the memo was not changing the company\'s plans on which intake system to use. He said slant wells would spoil beach accessibility because 30 or more wells would have to be installed along the coast.
Poseidon is awaiting one permit - a construction permit from the Coastal Commission - before it can begin construction on the US$ 1 billion Huntingdon scheme. Maloni anticipated the project would be heard in May.
[출처 = Desalination & Water Reuse / 2016년 1월 27일] -
[기술동향] [미국] 캘리포니아, 강우기 유량 확보 위해 임시 지하수저장허가 발행
[미국] 캘리포니아, 강우기 유량 확보 위해 임시 지하수저장허가 발행
캘리포니아주 수자원통제이사회는 스콧밸리 관개구역(Scott Valley Irrigation District)에 높은 봄·겨울철 유량을 확보하기 위한 첫 임시 지하수 저장 허가를 발행했다. 확보된 유량은 지역 지하수 저장 및 충전용으로 이용된다. 이번 허가는 물 전환 및 사용 부문에 있어 처음으로 발행된 임시허가의 일련이 될 것으로 기대된다. 한편, 임시허가는 지난 1월 13일부터 적용됐다.
[원문내용]
Calif. Water Board issues temporary groundwater storage permits to capture water from rainy season
The California State Water Resources Control Board (State Water Board) issued its first temporary groundwater storage permit to the Scott Valley Irrigation District to capture high winter and spring flows for local groundwater storage and recharge. The permit is the first in what is expected to be a series of temporary permits issued for this type of water diversion and use.
The temporary permit application was submitted Jan. 13 by the District in coordination with staff at the University of California at Davis, the California Farm Bureau Federation, Scott River Water Trust and others. The District proposes to divert up to 5,400 acre-feet of water during high water events using existing diversion structures. Water will be diverted from the Scott River using the District’s unlined earthen canal system and spread onto as many as 3,475 acres of existing, dormant agricultural fields within the District’s service area for infiltration.
“The predicted high rainfall events associated with El Nino this year provide an opportunity for accelerating groundwater recharge that we so critically need,” said State Water Board Chair Felicia Marcus. “This is the first of what we hope are many new opportunities for creative thinking and community effort to take advantage of storm flows everywhere we can. My thanks to everyone who helped allow us to turn this around in just a few days.”
Such temporary permits can reduce downstream flood risk and alleviate the effects of heavy groundwater pumping in the short-term, as well as demonstrate the feasibility of using available high water flows to recharge local groundwater.
The permit, consistent with water rights priorities and protections for fish and wildlife, is anticipated to enhance approximately 26 miles of habitat for fisheries downstream of the District’s diversion dam. The Scott River and its tributaries support runs of Upper KlamathTrinity rivers Chinook, Klamath Mountains Province steelhead, and state and federally threatened Southern Oregon-Northern California Coast coho salmon. Adding spring and summer river flows for salmonids through winter diversion to underground storage will increase groundwater base flow to the Scott River and improve conditions for salmonids.
A portion of the water diverted under this permit will be used to continue a study by researchers at UC Davis studying the infiltration effects of winter application of water on 15 acres of agricultural land in the Scott River Valley. The diversion season will last until the end of March.
[출처 = Water World / 2016년 1월 19일] -
[기술동향] [미국] 캘리포니아, 26개 지역 물관리 프로젝트에 자금 지원
[미국] 캘리포니아, 26개 지역 물관리 프로젝트에 자금 지원
캘리포니아 수자원 본부(California Department of Water Resources)는 26개 지역의 물관리 통합 프로젝트에 약 2억3천200만 달러를 자금을 지원할 계획이라고 발표했으며, 이에 지역 및 연방은 추가로 수백만 달러를 활용할 수 있다. 2006년에 물 관련 채권으로 주 전체유권자의 승인을 받은 이 보조금은 캘리포니아의 장기적인 물관리 수요를 충족시키기 위한 지원 사업 프로그램의 일환이다.
사업 및 프로그램은 안전한 음용수를 제공하는 것을 포함하며, △물재활용의 사용률 향상 △물절약 △홍수 위험도 감소 △유역 보호 △생태계 복원 △수질 보호 △지하수 관리 등이 해당된다.
[원문내용]
Calif. Dept. of Water Resources funding 26 regional water projects
The California Department of Water Resources today announced approximately $232 million in grant funding of 26 Integrated Regional Water Management projects that will leverage hundreds of millions of dollars in additional local and federal dollars.
The funds are from a 2006 water bond passed by voters statewide that supports projects and programs intended to meet California’s long-term water management needs. Projects and programs include delivery of safe drinking water, enhancement of recycled water use, water conservation, flood risk reduction, watershed protection, ecosystem restoration, protection of water quality, and management of groundwater.
The grants include the following:
·Association of Bay Area Governments, $41.3 million, 10 projects for dam seismic retrofit, groundwater infrastructure, watershed protection and other purposes;
·San Diego County Water Authority, $31.1 million, 14 projects for urban water conservation, turf removal rebate program, water treatment facility and other purposes;
·Los Angeles County Flood Control District, $27.7 million, 26 projects for meter installation, storm water management, water conveyance infrastructure and other purposes;
·Humboldt County, $11 million, 25 projects for water and wastewater conveyance and treatment infrastructure, watershed protection and restoration, agricultural efficiency and other purposes.
[출처 = Water World / 2016년 1월 14일] -
[기술동향] [GWTT] 중국과 지하수 배출 관련 교육 실시
[GWTT] 중국과 지하수 배출 관련 교육 실시
GWTT(Ground/Water Treatment & Technology, LCC)사는 이번 1월에 중국의 환경 모니터링 부서(Department of Environmental Monitoring)로부터 자사의 환경 개선 및 관리에 대한 교육 발표에 성공한 것에 기쁨을 표한다고 밝혔다.지난 12월 9일, 중국의 기술자들과 관리자들은 뉴저지 와튼(Wharton)에 위치한 GWTT사를 방문했다. 방문 시 건설 현상에서 지하수 배출을 규제하는 방법과 관련 규정 및 준수해야할 사항을 지속적으로 모니터링하는 방법에 대해 배웠다.
[원문내용]
GWTT & China on regulating groundwater discharge from construction
This January, Ground/Water Treatment & Technology, LLC (GWTT) is pleased to announce the success of an educational presentation between its environmental remediation contractors and officials from the Department of Environmental Monitoring of The People\''s Republic of China. On December 9, 2015, visiting Chinese engineers and officials met with Ground/Water Treatment & Technology, LLC (GWTT) in Wharton, NJ, to learn about regulating groundwater discharge from construction sites and how to better monitor for ongoing compliance with relevant regulations.
A group of 19 senior officials and engineers from China reached out to the United States and Ground/Water Treatment & Technology, LLC (GWTT) through Jessica Tan, who works with the international exchange department affiliated with the Ministry of Environmental Protection of the People\''s Republic of China.
While in the U.S. the Chinese officials also engaged in a training program at the University of North Carolina to better understand American surface water environment monitoring techniques, assessment systems, and treatment methods. China is still developing regulations for the control of contaminated groundwater and expressed interest in learning from techniques and methods utilized by U.S. companies like Ground/Water Treatment & Technology, LLC (GWTT).
“We were pleased to be able to educate some members of the Department of Environmental Monitoring of China about treating water from construction sites," said Robert Kunzel, CEO of Ground/Water Treatment & Technology, LLC (GWTT). "We hope they utilize the information they learned while in the U.S.”
The experts from Ground/Water Treatment & Technology, LLC (GWTT) conducted a presentation that focused on monitoring temporary treatment at construction dewatering sites, then covered the U.S. regulatory environment on a macro scale. Early U.S. regulations of the industry were modest, and only over the last 20 years have they become more strict.
In the presentation, Ground/Water Treatment & Technology, LLC (GWTT) also shared their knowledge of the economic benefits of clean sustainable water, which helps drive commercial and residential development along rivers and seas. People have always wanted to live near the water, and clean water is increasingly an important consideration both environmentally and financially.
In addition to the December educational exchange with the Chinese engineers, Ground/Water Treatment & Technology, LLC (GWTT) has participated in international outreach programs in the past. On May 18, 2015, Kunzel also gave a presentation at the Low Impact Development Environmental Solutions Seminar in Hong Kong.
"I see river walkways, hotels, restaurants being built along rivers throughout the world and it is in some part due to the enacted regulation and our diligence in minimizing the impact of development on the environment," Kunzel said at the time. "In the construction dewatering industry we have gone from virtually no regulation of the discharge, to a single page document, to a complex set of regulations of more than several hundred pages."
[출처 = Water World / 2016년 1월 8일] -
[기술동향] [미국] 캘리포니아, 우수관리전략 채택
[미국] 캘리포니아, 우수관리전략 채택
캘리포니아 수자원 관리위원회(State Water Resources Control Board)는 ‘우수관리전략(Storm Water Strategy)’을 채택해 캘리포니아에서 물자원을 이용한 빗물관리를 진행할 방침이다.
과거에는 관리되지 않았던 유출된 우수는 수질을 오염시키고 인간의 생명과 재산을 위협하는 요소로 간주되었다. 그러나 새롭게 채택된 우수관리전략은 지하수를 보충시키고 서식지를 개선하는 등 여러 장점이 있어 빗물의 가치를 증명한다.
[원문내용]
Calif. Water Board adopts stormwater strategy
The State Water Resources Control Board adopted a statewide Storm Water Strategy that seeks to advance storm water management in California as a water resource.
In the past, unmanaged storm water runoff has been viewed as water pollution and a threat to human life and property. The newly adopted Storm Water Strategy promotes the value of storm water for multiple benefits such as groundwater replenishment and habitat improvement. The goal of the strategy is to use storm water to improve water quality and supply for local communities and long term state water supply needs.
“The drought, and the specter of more frequent droughts due to climate change, requires us to dramatically rethink how we manage storm water in California,” said State Water Board Chair Felicia Marcus. “Storm water should no longer be viewed as a nuisance, but instead embraced as an immediate and future water resource. With the right planning to capture it rather than shunting it away, local communities can improve local flood control, water quality, and water supply, including groundwater recharge, while contributing to urban greening-all of which will benefit current and future generations of Californians.”
ACWA submitted acomment letter on the draft strategy. In response, officials added water suppliers to the committee they will be forming to advise on implementation. ACWA Regulatory Advocate Adam Walukiewicz Robin testified in support of the strategy’s overall vision of “treating storm water as a valuable resource” and expressed appreciation for the addition of water suppliers to the committee.
The California Water Action Plan, released in January 2014, called for multiple benefit storm water management solutions and more efficient permitting programs. The Storm Water Strategy identifies the goals, objectives, and actions for the State Water Board and Regional Water Boards to continue to improve the regulation, management, and utilization of California’s storm water resources.
[출처 = Water World / 2016년 1월 8일]
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