Record Details
page 3-79
Digital Collections at BYU
| Field | Value |
|---|---|
| Title | page 3-79 Phase II summary report (final) : Utah Lake water quality, hydrology and aquatic biology impact analysis summary for the irrigation and drainage system--Bonneville Unit, Central Utah Project, page 3-79 |
| Coverage | Electronic reproduction; |
| Format | 3-79 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; exact species present will depend on the final placement of the dike and the reaction of certain species to this location while we cannot predict exactly the species composition we feel that unless there is drastic silting or extreme wave action along the dikes the community that develops will be very similar to the present rocky shore communities at lincoln point this means that amphipods amphipoda chironomids and polycentropus trichoptera should exist on the dike along with physa hydroptilla and various hemipterans Hemipter ans it is likely that over most of the goshen bay dike hydropsyche Hydro psyche will be absent if the prevailing current and wind patterns extend along the dike face we also predict that if the rubble face of the dike is extended into enough water depth the typical sponge bryozoa amphipod community will develop it is important to realize that the drawdown of utah lake at the maximum drawdown level of 29 2.9 29 m 93 9.3 93 ft below compromise in dike plans I 1 through IV or to the 3.7 37 37 m level 12 ft of plan V will threaten several rocky shore inhabitants the amphipods amphipoda gastropods gastropoda gastro pods extensive sponge colonies and trichopterans trichopter ans polycentropus and hydropsyche Hydro psyche could be eliminated from the lake system since these groups are important functional units of the littoral such a loss would be significant therefore to establish sufficient refugia for these taxa we recommend that the dike facing be extended at least an additional 50 cm below the established legal drawdown level approximately 3.4 34 34 and 4.2 42 42 meters below compromise for the 2.9 29 29 and 3.7 37 37 meter drawdowns draw downs respectively the dike slope should also closely resemble the slope on existing rocky shore areas one important factor to consider is the ability of primary producers algae to become established as epilithic epi lithic inhabitants with changing water levels because of the turbidity of the lake the littoral eutrophic zone is relatively narrow A steep slope will reduce the width of this zone and rapid fluctuations in water level due to annual drawdown may be very disruptive to the developed community especially to grazier organisms by having a slope similar to that existing currently in rubble regions of the lake we can be assured that the communities on the dike fronts will be adapted to the 3 79 |
| Identifier | http://cdm15999.contentdm.oclc.org/cdm/ref/collection/WesternWatersProject/id/10280 |
