At present, the shortage of water resources has become a serious constraint to the further development of social economy. The optimal allocation of multi-water resources is valuable for agricultural water management in arid and semi-arid regions. However, traditional deterministic programming does not solve the complex water resources allocation in irrigation systems. Furthermore, previous allo...

introduction lake terraces are geomorphological evidence of climate change during quaternary. location of these terraces location in different elevation shows paleo water lake level fluctuations. investigation about urmia lake terraces was conducted by bobek (1973).he found those terraces in 45-55 meter above urmia water level on that time. according to bobek, development of lake area in paleo ...

Edwardsiella tarda was isolated from patients, water tortoises (Clemmys caspica), and samples of water from Lake Kinnereth, the river Jordan, well water, and sewage water. Of the 53 isolates, 35 belonged to completely identified serotypes, among them 7 new ones. Fourteen cultures had O antigens, and one had an H antigen, different from those previously described. Three serotypes isolated from p...

A1.0 Belews Lake, North Carolina ................................................................... 259 A1.1 Selenium Source ......................................................................... 259 A1.2 Fate and Transformation ............................................................ 259 A1.3 Effects .........................................................................................

Otsego Lake (Otsego County, NY), of glacial origin, fonns the headwaters of the Susquehanna River. It is a deep (50.5 m max) dimictic waterbody of4,167 acres having a catchment of46,482 acres. The lake serves as the potable water supply for the Village of Cooperstown and it is noted for its cold water fishery, which includes native lake trout and whitefish as well as stocked brown trout and Atl...

The Study of river water quality interation with lakes and dam reservoirs is important from anexploitation point of view. When river water with different densities enters a lake or dam reservoir,underflow density current phenomenon occurs. Because of the density, so understandingdifferent arrays of this phenomenon Seems necessary for checking erosion and sedimentationprocesses and their managem...

Algal bioassay tests were conducted with Selenastrum capricornutum and natural algae on inner Las Vegas Bay, Lake Mead, Nevada, from December 1992 through September 1993, to identify any nutrient limitation in an area of the reservoir that has experienced problems associated with severe nutrient enrichment. Three areas were sampled based on a gradient of water quality conditions that existed in...

This paper describes a general Bayesian methodology for reservoir operations. This methodology is applied to the operation of the two main reservoirs in the Zambezi river: Lake Kariba and Cahora Bassa.

The vast majority of the isolations of Clostridium botulinum type E have been from marine fish and their environment, with very few from fresh-water lakes and streams. Johannsen (J. Appl. Bacteriol. 26:43, 1963) has found the organisms to be common in Norway and Sweden's coastal and river waters where the salinity is fairly low, and Prev6t and Huet (Bull. Acad. Natl. Med., Paris 135:432, 1951) ...

Late-run stocks are unique among Fraser River sockeye salmon populations in that they typically delay in Georgia Strait 4 to 6 weeks prior to migrating upstream to spawn. Beginning in 1995, and continuing through 2002, this delay period to 6 weeks earlier than normal. Each year, the early river entry has been associated with high rates of en-route and prespawning mortality (>90% in 2000 and 200...