Detention rockfill dams are an easy and common tool for flood control. Due to their coarse pores, the flow in void spaces is turbulent and non-Darcy. Different relationships introduced by researchers are used to define the hydraulics of the flow within the rockfill materials. The present research is aimed at gaining a better understanding of the difference among these relationships and the sour...

The usefulness of a hydrologic model is directly related to its application and how well it is calibrated. Calibration is a subjective exercise where model parameters are adjusted to reduce discrepancies between measured data and modeled predictions. Automated calibration can be used to accelerate the model calibration process, minimize modeler bias, and increase the goodness of fit between mea...

Introduction Conclusions References Tables Figures Back Close Full Screen / Esc Abstract Introduction Conclusions References Tables Figures Back Close Full Screen / Esc Abstract This study compared a time source hydrograph separation method to a geographic source separation method, to assess if the two methods produced similar results. The time source separation of a hydrograph was performed us...

Abstract This study presents the preliminary stage of development a conjunctive surface-subsurface model for simulating flow in swale. The surface is modelled by one-dimensional dynamic wave equation. To improve accuracy, third-order numerical scheme used to solve advection terms model. Meanwhile, subsurface as vertical through nondeformable porous media without air compression effect. At stage...

introduction flood is an inevitable natural phenomenon occurring from time to time in all rivers and natural drainage systems, which not only damages the lives, natural resources and environment, but also causes the loss of economy and health. so estimation and prediction flood hazard is very important spatially in the watersheds without measurement station. there are many models in the water a...

We present the isotopic composition of meltwater samples from four seasonal snowpacks: a warm, maritime snowpack in California; a temperate continental snowpack in Vermont; a cold continental snowpack in Colorado; and an Arctic snowpack in Alaska. Despite the very different climate conditions the υ18O of meltwater from all four snowpacks increased as melting progressed. This trend is consistent...

Inundation models based on the Shallow Water Equations (SWE) have been shown to perform well for a 3 wide variety of situations even at the limit of their theoretical applicability and, arguably, somewhat beyond. One of 4 these situations is the catastrophic event of floods induced by dyke breach and consequent dyke erosion. The dyke 5 collapse is often not sudden as assumed by many flood simul...

[1] Nitrate (NO3 ) movement was studied using a combination of isotopic, chemical, and hydrometric data within the 135 ha Archer Creek watershed in the Adirondack Mountains of New York from January 1995 to December 1996. This research was conducted to identify sources of stream water NO3 and the mechanisms that deliver NO3 to the stream to test two hypotheses: (1) Soil water NO3 concentrations ...

Abstract. With the increasing attention on environmental flow management for maintenance of habitat diversity and ecosystem health mountain gravel-bed rivers, much interest has been paid to how inter-flood low can affect river morphodynamics during subsequent flood events. Previous research found that antecedent conditioning lead an increase in critical shear stress a reduction sediment transpo...

Effective science-based management of water resources in large basins requires a qualitative understanding of hydrologic conditions and quantitative measures of the various components of the water budget, including difficult to measure components such as baseflow discharge to streams. Using widely available discharge and continuously collected specific conductance (SC) data, we adapted and appl...