The California Department of Water Resources has continued to push for higher flows in the Stanislaus, Tuolumne, Merced and San Joaquin Rivers with the specific focus on volume of water released during spring runoff. Although over the course of the year, over half of the Stanislaus River's runoff is allowed to flow unimpaired down the river, this proportion is much lower – 20 percent or less – during the spring snowmelt when the majority of water is being captured in reservoirs for later use. The state has recommended that 40 percent of the spring runoff be allowed to flow down the river; some environmental groups have pushed for as much as 60 percent. These amounts would be greater than what is already required, leaving even less to support the local farming economy. The South San Joaquin Irrigation District – which, under the proposal, stands to lose as much as two-thirds of its surface water supply during dry years – has pushed for all factors and potential solutions to be considered, including "better timing of releases, habitat restoration, hatchery management, addressing predators, water temperatures, more restrained water releases, and cool water pools behind reservoirs".