Abstract An important part of geothermal development is the re-injection waste fluids into reservoir, which can extend life resource. However, difficulty recharge and clogging problem in process are still a worldwide that restricts sustainable utilization sandstone reservoirs. The main factor affecting effect physical clogging. In this paper, series simulation experiments were conducted to stud...

With the increasing availability of low head dam inventories for United States, next challenge is discovering how to determine what dams pose greatest risk public safety, preferably before a death occurs. Submerged hydraulic jumps create dangerous current that drowns roughly 50 recreationists each year, and high tailwater key element in its formation. Using simplified approach based on Manning ...

Freshwater fish populations often exist in systems characterized by novel ecological processes resulting from human alteration. Salmonid embedded within coldwater sections of warmwater rivers are spatially constrained habitat availability. Tailwater contend with fluctuating river discharges and density-dependent associated stocking exploitation. sustained through versus natural reproduction may...

The Soil and Water Assessment Tool (SWAT) was calibrated for hydrology conditions in an agricultural watershed of Orestimba Creek, California, and applied to simulate fate and transport of two organophosphate pesticides chlorpyrifos and diazinon. The model showed capability in evaluating pesticide fate and transport processes in agricultural fields and instream network. Management-oriented sens...

Flooded post-harvest rice paddies were examined as systems for reducing diazinon (organophosphate insecticide) concentrations in stormwater runoff. Two paddies were cultivated in Oryza sativa L. and amended with a 3-h simulated stormwater diazinon runoff event. Initial diazinon adsorption peaked at 347 and 571 μg kg (3% mass load reduction) for mean above-ground plant tissue concentrations in e...

—We conducted an intensive fish survey in the tailwater reach of a large Ozark river 30 years after its impoundment and compared the recent fish assemblage with those prior to impoundment and shortly (4 years) after impoundment. Our primary objective was to assess whether relatively short-term monitoring following dam construction can adequately quantify the long-term effects of impoundment on ...