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California considers stepping in to manage groundwater basin in farm country_我的网站

A |     　　重庆8月25日电(肖江川 王津川 梁勇)25日，重庆唯一具备周调节能力的抽水蓄能电站——中国大唐重庆武隆银盘抽水蓄能电站项目实现地下厂房中导洞全面贯通和导流泄洪洞进口顺利进洞两个关键节点的突破，这也为项目主体工程建设按期推进创造了有利条件。    SACRAMENTO, Calif. -- California officials on Thursday faulted communities in a stretch of the crop-rich San Joaquin Valley for failing to develop a plan to adequately protect groundwater in the often drought-plagued state.The state's water resources board set an April hearing to determine whether the Tulare Lake Subbasin in the heart of California's farm country should be placed on probation. It is the first time the state has made such a move, and the first step in a lengthy process that could end up requiring large farms in the area to report groundwater use and pay fees.California is starting to regulate the pumping of groundwater after years of drought and overpumping left rural residents’ wells dry and led to subsidence, or the sinking of land, in some communities. Both issues have affected the largely agricultural region, which is home to 145,000 people, and stand to worsen absent revisions to the local groundwater plan, officials said.“This is an urgent issue,” said Natalie Stork, an official at the State Water Resources Control Board. “There are urgent impacts from continued overdraft in these basins.”The state enacted a 2014 law tasking communities with forming groundwater agencies and making plans to manage the resource sustainably, starting with the most critically overdrafted basins, including the Tulare Lake Subbasin.Five groundwater agencies joined together come up with a plan for the subbasin where farmers grow cotton, almonds and pistachios. But the plan was one of six that California's Department of Water Resources deemed inadequate this year.Now, the State Water Resources Control Board will hold a hearing April 16 to decide whether to place the Tulare Lake Subbasin on probation. If it does, large pumpers would report their groundwater usage and pay fees while the local agencies draft a new plan for the basin. If they don't, the board could eventually implement its own plan.Many communities rely mainly or solely on groundwater for drinking water and farmers count on it for irrigation, especially in a drought. California muddled through a spell of dry years until a series of winter storms drenched the state and dumped massive amounts of snow in the mountains. When the snow melted, it flowed down to form the reemerging Tulare Lake, which covered vast stretches of farmland with water. California has long tended toward wet and dry periods, but scientists at University of California, San Diego’s Scripps Institution of Oceanography have said they expect climate change will lead to drier dry years and wetter wet years.。

B | 　　据介绍，项目地下厂房中导洞位于主副厂房一层中部，全长188.95米，开挖断面宽11米、高9.5米，洞室石方开挖量超过2.2万立方米。中导洞贯通后，主厂房分层扩挖及主体结构施工核心作业通道全面打通。　　该项目导流泄洪洞位于上水库大坝右岸山体内，洞身长677米，净断面宽4米、高5米，承担疏导河道水流、保障主体工程干地施工和抵御汛期洪水等任务。此次顺利进洞，标志着这一关键控制性工程进入洞身施工阶段，为后续河道截流和大坝主体填筑奠定基础。图为建设中的中国大唐重庆武隆银盘抽水蓄能电站。朱小龙 摄　　中国大唐重庆武隆银盘抽水蓄能电站位于武隆区文复乡、江口镇境内，总装机容量120万千瓦，安装4台30万千瓦可逆式水轮发电机组。作为“十五五”期间重庆市重点推进的清洁能源项目，电站建成后，将承担重庆电网调峰、填谷、储能、调频、调相及紧急事故备用等任务，进一步提升重庆电网灵活调节能力和安全稳定运行水平。

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