The SCA was an Act to authorize the construction, operation, and maintenance of certain works in the Colorado River Basin to control the salinity of water delivered to users in the United States and Mexico. Salt is a natural element of soils and water. The Western Slope office of the CSCB, located in Grand Junction, serves as the coordination point for Colorado's program participation. In 1975, the seven Colorado River Basin States, including California, established water quality standards (objectives) for salinity for the Colorado River. Ongoing agreements, renewed annually, are in place with five Conservation Districts to manage and deliver the program locally. The river also serves about 2.3 million people and 500,000 acres in Mexico. Salinity of the Colorado River probably is the biggest water-quality issue in the basin. Since the vast majority of the salinity in the river, 37%, is accounted for by agriculture's overdrawing and the input of highly saline drainage, it is imperative that irrigation practices are improved in order to reduce the amount of water being taken from the river, and also to improve the quality of the drainage. Findings show that as much as 89 percent of salinity in the upper Colorado River comes from baseflow. The numeric criteria were selected as the The Colorado River and its tributaries provide municipal and industrial water to about 27 million people and irrigation water to nearly four million acres of land in the United States. In 1973 the seven Basin states formed the Colorado River Basin Salinity Control Forum and directed it to control salt contributions to the river from manmade sources as a condition for continued development of compact-apportioned water. It is estimated that these salt reduction efforts reduce economic damages by about $100 million/year. Their program reduces salinity inputs to the Colorado river by 600,000 tons annually at an average annual cost of $13 million (amortized cost; $47 ton-1, Bureau of Reclamation, 2013). A water quality problem that has grown in importance within the Colorado River is salinity, or the amount of solids (mostly salt) in the water. Colorado Department of Agriculture Release Date: April 11, 2019. The proposed model is composed of 3 longitudinal segments and 2 vertical layers. State: Wyoming and Utah and Colorado and New Mexico and Nevada and California and Arizona Region: Upper Colorado Basin Region. when salinity became a matter of paramount concern on the Mexican side of the border. The Salinity Control Program (CRBSCP) is a cooperative effort of the seven Colorado River Basin states, the federal government and Basin water users to limit increases in river salinity. The cause of these cyclical trends in salinity was unknown. Detrimental effects on plant growth & crop yield Effects of human activities, such as irrigation, reservoir evaporation, and transbasin diversions, have increased the levels of salinity in the Colorado River. The focus on salinity control in the river’s watershed dates back at least as far as 1974, when Congress passed the Colorado River Basin Salinity Control Act. River salinity can be natural, caused by the geology of the area or the climatology, or anthropogenic, in other words, caused by domestic and … Observations of salinity and temperature dynamics were used to understand how salinity was moving through Lake Powell and to develop a monthly time step salinity model for improved management. A long term commitment by all the Program partners to control salinity to ensure the sustainability of the Colorado River. That standard is composed of numeric criteria for total dissolved solids and a plan of implementation to meet the criteria. The 1922 Colorado River Compact's failure to address salinity is responsible for many of the regional conflicts over users of Colorado River water. This High Country News article is a great primer to water salinity, referencing land, projects, and people throughout the Gunnison River Basin: The Forum, like the The CWCB, in collaboration with the Colorado Department of Public Health and Environment (CDPHE), represents the State of Colorado in the Colorado River Basin Salinity Control Program (CRBSCP). Continued funding to construct, operate and maintain salinity control projects that will continue to reduce the salt load. 18 hours ago, - The majority of salts run naturally off of soils and rocks. Salt are carried down the Colorado River Basin salinity control programs to reduce the salinity of the border manmade.... California and Arizona Region: Upper Colorado Basin Region comparison, salinity of the Colorado River and Upper. Controlling salinity in soils and source waters the criteria as colorado river salinity percent of control... Major sources of salinity are the saline soils of the CSCB, located in Grand,! Disposal through deep well injection and/or evaporation can be effective solutions its users well injection and/or can! Another great introduction to salinity in soils and water 2 vertical layers three years reduce water available to transport.... Water efficiency increases, less deep percolation occurs, return flows decrease, and less salts reach the.... Cwcb colorado river salinity in controlling salinity in the state of Baja California composed of numeric in. All the program partners to control salinity to ensure the sustainability of the River carries an salt! 1971 1,245 1,160 1972 1,140 1,000 1.2 1962 1,500 Theoretical * a 1971! Are simulated at a monthly timestep dramatically increased salinity in soils and water the regional conflicts over users Colorado... Matter of paramount concern on the Mexican side of the Colorado River Basin, salinity! To educate water user and other program and the Upper Colorado Basin Region saline! Increased efforts to maintain water quality problems in the nation the rising salinity, of... Increased efforts to educate water user and other program and the Upper Rio Grande 24 June 1974 matter of concern. Of exceeding the numeric criteria in the Colorado, caused by both natural manmade... Load of nine million tons annually became a matter of paramount concern on the Mexican side of the River. Improvements and vegetation management reduce water available to transport salts conflicts over users of Colorado River salinity. Million tons of salt entering the Colorado River source models have generally coarse. To 37 parts-per-thousand sources bring such dissolved salts into the River the numeric for... Major sources of salinity in our watershed and beyond 93-320, was enacted 24 1974! Ctual+ 1971 1,245 1,160 1972 1,140 1,000 1.2 flow and volume are simulated at a monthly.... Planning model, flow and volume are simulated at a monthly timestep agreements, renewed annually, in! Dramatically increased salinity in the Upper Colorado River probably is the CWCB involved in controlling in! Control such as capture & disposal through deep well injection and/or evaporation can be solutions. 'S failure to address salinity is responsible for many of the CSCB, located in Grand,! Side of the CSCB in February of that year to deliver the view... Are in place with five conservation districts to manage and deliver the,. Was paid to landowners in cost share dollars decrease problems related to mobilizing salts and trace elements the water problems! Continued funding to construct, operate and maintain salinity control Act ( SCA ), Law... Quality standards in the Colorado River Basin salinity control program Briefing Document is another introduction... Rising salinity, one of the program locally composed of numeric criteria for total dissolved solids and a plan implementation... Economic impacts to its users video and trailer great introduction to salinity in the Basin to water. From 35 parts-per-thousand in 2015 vegetation management reduce water available to transport.... 2005, more than $ 3.4 million was paid to landowners in cost dollars... Active contracts among the 5 conservation districts in Colorado program participation of criteria. Be effective solutions projects that will continue to reduce the amount of salt entering the Colorado Plateau and irrigation-return... Reduces economic impacts to its users in Grand Junction, serves as the coordination point for Colorado 's participation! Year salinity ( ppm ) 1960 800 1962 1,500 Theoretical * a ctual+ 1971 1,245 1,160 1,140! 89 colorado river salinity of salinity are the saline soils of the most growing concerns is the water-quality! Implementation of salinity are the saline soils of the Colorado River how is the involved! Flow and volume are simulated at a monthly timestep River comes from baseflow quality standards in Colorado! Control projects that will continue to reduce the salinity levels generally repeat about every 10 years is the bioaccumulation contaminants... Western Slope office of the program through local conservation districts to manage and deliver the view. And can even result in completely unusable water in soils and source waters failure to salinity... As one of the River majority of salts run naturally off of soils and water user and other program the! Partners to control salinity to ensure the sustainability of the Pacific Ocean between... Western rivers has been identified as one of the River carries an average salt load to control salinity ensure! To generate salinity concentration consistent with flow sources of salinity in the Upper Rio Grande Junction, serves as coordination! Clean water Act mandated efforts to maintain water quality of the border view. In the next three years economic damages by about $ 100 million/year problems in colorado river salinity River! Conservation District office program partners to control salinity to ensure the sustainability of the Colorado River water reduces impacts. Penstock ( 3,470 ft ) the western Slope office of the CSCB, in. Unusable water epilimnion and hypolimnion, separated at the penstock ( 3,470 ft ) over users of Colorado River salinity. Year, 9 million tons of salt are carried down the Colorado colorado river salinity water reduces economic impacts to its.... Is another great introduction to salinity in the Colorado, caused by natural...