نتایج جستجو برای: hydrologic analyses

تعداد نتایج: 391624  

Journal: :Journal of environmental management 2002
Susanna T Y Tong Wenli Chen

It is widely known that watershed hydrology is dependent on many factors, including land use, climate, and soil conditions. But the relative impacts of different types of land use on the surface water are yet to be ascertained and quantified. This research attempted to use a comprehensive approach to examine the hydrologic effects of land use at both a regional and a local scale. Statistical an...

Journal: :Environmental Modelling and Software 2013
Jonathan L. Goodall Kathleen D. Saint Mehmet B. Ercan Laura J. Briley Sylvia Murphy Haihang You Cecelia DeLuca Richard B. Rood

Understanding regional-scale water resource systems requires understanding coupled hydrologic and climate interactions. The traditional approach in the hydrologic sciences and engineering fields has been to either treat the atmosphere as a forcing condition on the hydrologic model, or to adopt a specific hydrologic model design in order to be interoperable with a climate model. We propose here ...

Journal: :Environmental science & technology 2015
Kristina G Hopkins Nathaniel B Morse Daniel J Bain Neil D Bettez Nancy B Grimm Jennifer L Morse Monica M Palta William D Shuster Anika R Bratt Amanda K Suchy

Aquatic ecosystems are sensitive to the modification of hydrologic regimes, experiencing declines in stream health as the streamflow regime is altered during urbanization. This study uses streamflow records to quantify the type and magnitude of hydrologic changes across urbanization gradients in nine U.S. cities (Atlanta, GA, Baltimore, MD, Boston, MA, Detroit, MI, Raleigh, NC, St. Paul, MN, Pi...

Journal: :Journal of Hydrology: Regional Studies 2022

Middle and lower Hanjiang River (MLHR) basin, China. Changes in streamflow are often due to intertwined factors like climatic variability, land use change, hydraulic constructions, whose relative impact is however poorly understood. In this study, we disentangled these effects by comparing real data modelled scenarios of catchment behaviour. Modelled employ the soil water assessment tool (SWAT)...

2005
CHRISTOPHER P. KONRAD DEREK B. BOOTH

—Urban development modifies the production and delivery of runoff to streams and the resulting rate, volume, and timing of streamflow. Given that streamflow demonstrably influences the structure and composition of lotic communities, we have identified four hydrologic changes resulting from urban development that are potentially significant to stream ecosystems: increased frequency of high flows...

سیف اله امین, , عبدالمجید غفوری روز بهانی, ,

Prediction of watershed responses and simulation of runoff rate and volume are required for design purposes in most water resources projects. For this purpose, different hydrologic methods and events based on continuous hydrologic mathematical models are applied. In this research, a continuous hydrologic model, Stanford Watershed Model-IV (SWM-IV) is used for simulation of annual and monthly vo...

2012
B. Dafflon W. Barrash

[1] Estimation of the three-dimensional (3-D) distribution of hydrologic properties and related uncertainty is a key for improved predictions of hydrologic processes in the subsurface. However it is difficult to gain high-quality and high-density hydrologic information from the subsurface. In this regard a promising strategy is to use highresolution geophysical data (that are relatively sensiti...

2015
Cassandra D. Smith T. Zachary Freed Paul T. Leisnham Alexander W. E. Franz

Allochthonous leaf litter is often the main resource base for invertebrate communities in ephemeral water-filled containers, and detritus quality can be affected by hydrologic conditions. The invasive mosquito Aedes albopictus utilizes container habitats for its development where it competes as larvae for detritus and associated microorganisms with the native Aedes triseriatus. Different hydrol...

Journal: :Environmental Modelling and Software 2014
Jeffery S. Horsburgh David G. Tarboton Richard P. Hooper Ilya Zaslavsky

The ability to discover and integrate data from multiple sources, projects, and research efforts is critical as scientists continue to investigate complex hydrologic processes at expanding spatial and temporal scales. Until recently, syntactic and semantic heterogeneity in data from different sources made data discovery and integration difficult. The Consortium of Universities for the Advanceme...

2010
Anna Palla John J. Sansalone Ilaria Gnecco Luca G. Lanza

The objectives of this study are to provide detailed information about green roof performances in the Mediterranean climate (retained volume, peak flow reduction, runoff delay) and to identify a suitable modelling approach for describing the associated hydrologic response. Data colleted during a 13 month monitoring campaign and a seasonal monitoring campaign (September to December 2008) at the ...

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