Record Details
page 126
Digital Collections at BYU
| Field | Value |
|---|---|
| Title | page 126 Central Utah Project, Bonneville Unit : Diamond Fork Power System : final Environmental Impact Statement, page 126 |
| Coverage | Electronic reproduction; |
| Format | 126 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; CHAPTER IV AFFECTED environment AND environmental consequences to latter part of july fall overturn normally occurs between septem ber 1 and 20 during summer stratification the average water temperatures of the upper portion above thermocline of the reservoir vary from about 6 to 10 C in may to a maximum of about 18 to 19 C in late july early august water temperatures in the lower portion below the thermocline of the reservoir vary from about 5 C in may to about 70 7 to 100 loo 10 C in late august dissolved oxygen and phosphorus total levels during this same period are shown below dissolved total oxygen phosphorus location egl mgl egl mgl above thermocline 610 6 10 0.030 0030 below thermocline 0 3 .157 157 entire reservoir if mixed 045 .045 045 the present estimated phosphorus load to strawberry reservoir is 8933 kilograms per year table 27 this represents an average inflow concentration of 0.096 0096 egl mgl total phosphorus and an average nutrient loading of 0.354 0354 gram per square meter of surface area per year water quality studies of strawberry reservoir indicate the reservoir is even more eutrophic than the phosphorus loading models show this may be due to the high efficiency of internal phosphorous recycling heavy recrea reccea tional dional use bank instability e erosion roslon silt loading and septic tank leaching however these sources are not entirely measured in the stream monitoring program As part of the watershed management study for strawberry reservoir referred to previously it has been determined that reductions in bio logically available phosphorus inflows from septic tanks livestock grazing and areas of excessive erosion may be feasible phosphorus release rates from sediments in the reservoir have been determined re cently bently at the utah water research laboratory messer et al in preparation these studies indicate that phosphorus release rates are low compared to other utah reservoirs in addition the strawberry reservoir sediments are poor phosphorus binders any phosphorus released from decaying phytoplankton algae is probably rapidly reutilized utilized reutilizes re biolog bialog ically icalla very little bioavailable available bio phosphorus is stored in the sediments and little will be released in response to a reduction of external sources consequently internal phosphorus loading from reservoir sedi ments is not likely to delay the trophic response of strawberry as it has in many lake restoration projects algal assays essays conducted on strawberry river and indian creek canal during spring runoff indicate that phosphorus is the limiting nutrient reservoir samples indicated that at times november and february nitrogen is the limiting nutrient and at other times at spring and fall turnover both nitrogen and phosphorus seemed jointly limiting low nitrogen levels probably encourage the selective growth of the noxious 126 |
| Identifier | http://cdm15999.contentdm.oclc.org/cdm/ref/collection/WesternWatersProject/id/3921 |
