Record Details
page C-81
Digital Collections at BYU
| Field | Value |
|---|---|
| Title | page C-81 Final environmental statement : authorized Upalco Unit, Central Utah Project, Utah, page C-81 |
| Coverage | Electronic reproduction; |
| Format | C-81 text/PDF |
| Rights | Brigham Young University; http://lib.byu.edu/about/copyright/generic.php Public Domain Public |
| Language | English; eng; en |
| Relation | Central Utah Project; Western Waters Digital Library; f salinity 1 CRSP developments constructed or under construction the salinity level of the colorado river at imperial dam under 1976 modified base conditions including effects of CRSP developments constructed or under construction is estimated at 1100 mgl mg1 mgt egl this reflects the effects of many variable factors it includes the natural salt in the river before mans activities both in upper and lower colorado basin as well as salt resulting from mans activities including storage regulation diversions for use within and outside of the basin evaporation and return flows because of the many variable factors involved it is is extremely difficult to determine the effects on salinity from any particular development nevertheless it has been estimated that of the 1100 mg1 mgl mgt salinity level in the modified base approximately 1471 147 mg1 mgt or 13 percent could be attributable to the units and participating projects of the CRSP included in the base of t the e total 147 mgl mg1 mgt contribution 128 mg1 mgl mgt would be attributable to concentrating effects of stream depletion and 19 mg1 mgl mgt to the salt loads contributed except in cases where special studies have been made to determine specific loading from a project it has been assumed that irrigation wo4id would increase the salt load from new lands by 2 tons a an n acre but would result in no addi dional tional salt load from supplemental service lands the depletions and salt loads from each development are shown in table C 31 2 developments scheduled for construction since 1976 Es estimates have been made of salinity impacts that could be expected with the five developments in the upper colorado river basin scheduled for construction since since 1976 table C 32 shows the developments effects on the colorado river system at points above imperial dam while table C 33 shows the estimated salinity impacts of the developments at imperial dam table C 33 also shows estimates of economic externalities of the salinity effects these external ities aties have been based on a rate of 343000 for each mg1 mgl mgt of salinity increase at imperial dam this rate has been estimated by the bureau of reclamation and takes into account s reduced productivity and increased agricultural production costs that downstream water users might experience from the salinity impacts it also takes into account increased costs that might be necessary for treatment of municipal and industrial water as a result of salinity increases and the reduced life of water pipes and other facilities that would result from the increases in concentration 3 overview of colorado river estimates of future salinity levels in the colorado river are highly speculative various entities have made projections in the past and have arrived at differing estimates because of different C 81 |
| Identifier | http://cdm15999.contentdm.oclc.org/cdm/ref/collection/WesternWatersProject/id/4070 |
