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Topic: Runoff (hydrology)

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Hydrology - Hydraulics Engineering - FHWA Hydrology is the scientific study of water's properties, distribution, and effects on the earth's surface and atmosphere. HEC 25 - Tidal Hydrology, Hydraulics, and Scour at Bridges This site Includes information concerning precipitation, surface and ground water runoff, and floodplains (including FEMA regulated floodplains). www.fhwa.dot.gov /engineering/hydraulics/hydrology/index.cfm   (89 words)

Open Directory - Science: Environment: Water Resources Hillslope and Watershed Hydrology Lab, Oregon State University- Conducts research on the hydrologic cycle, particularly runoff generation processes in diverse watersheds. Snow Hydrology Research Group, UC Santa Barbara - Information about research on watershed hydrology and modeling, remote sensing, and data management. Spatial Hydrology - Internet directory for hydrologic modeling, GIS, GPS and remote sensing. dmoz.org /Science/Environment/Water_Resources   (1388 words)

Hydrologic calculation for storm runoff discharge and curve numbers for watersheds Technical Release 55: Urban Hydrology for Small Watersheds. Based on the USA Soil Conservation Service publication TR-55 (1986): Urban Hydrology for Small Watersheds Hydrologic calculations for Peak Discharge, Runoff Depth, Runoff Curve Number, Time of Concentration, and Travel Times www.lmnoeng.com /Hydrology/hydrology.htm   (1439 words)

National Weather Hydrology Laboratory #401 CARPENTER, T.M.; SPERFSLAGE, J.A., GEORGAKAKOS, K.P.,SWEENEY, T.L., FREAD, D.L.; "NATIONAL THRESHOLD RUNOFF ESTIMATION UTILIZING GIS IN SUPPORT OF OPERATIONAL FLASH FLOOD WARNING SYSTEMS", Journal of Hydrology, February 1999. #277 SMITH, GEORGE F., HUBER, WAYNE C., "A NEW PERSPECTIVE OF NONLINEAR ROUTING IN HYDROLOGY," TO BE SUBMITTED FOR PUBLICATION AS A NOAA TECHNICAL REPORT, March 31, 1990. #263 FREAD, D.L., "NWS MODELS THAT FORECAST DAM-BREACH FLOODS," PUBLISHED IN THE PROCEEDINGS OF THE WMO TECHNICAL CONFERENCE ON THE HYDROLOGY OF DISASTERS, GENEVA, SWITZERLAND, November 2, 1988 (DLF Publication #59). hydrology.nws.noaa.gov /oh/hrl/papers/hrlpub.reverse.htm   (11803 words)

HYDROLOGY The possible effects of land cover/land use change on runoff within the watershed is discussed in the Land Use/Land Cover Section of this document. The highest daily mean discharge at this station is 31,800 cfs which occurred on November 15, 1993 while the lowest daily mean discharge is 67 cfs which occurred on September 16, 1956. Comparison of percent change in precipitation (+8%) and daily mean discharge (+20%) would indicate that the increase of discharge in the latter time period is not entirely attributable to an increase in precipitation. www.conservation.state.mo.us /fish/watershed/jcksfork/hydro/160hytxt.htm   (11803 words)

Water Quality and Hydrology Storm water runoff from the irrigation field shall not be discharged to any surface water drainage course within 30 days of the last application of reclaimed water. Discharge of recycled water and untreated industrial wastewater (reclaimed water) to surface waters or surface water drainage courses is prohibited. Monitoring results for other constituents did not indicate that any would be discharged at a level that would cause, have reasonable potential to cause, or contribute to an in-stream excursion above a narrative or numerical water quality standard. www.lodi.gov /eir/4.3water_quality.htm   (11803 words)

Vermont Stormwater Section Homepage Management activities designed towards replicating natural hydrology on developed sites and which consider the watershed-wide impacts of stormwater runoff have the greatest potential for success. The Stormwater Management Section provides both technical assistance and regulatory oversight to ensure proper design and construction of treatment and control practices - necessary to minimize the potentially adverse impacts of stormwater runoff on receiving waters throughout Vermont. The management of stormwater runoff is at once a simple concept and a complex problem. www.anr.state.vt.us /dec/waterq/stormwater.htm   (11803 words)

Mark W. Williams, Ph.D Activities including drilling a shallow ice core (16 meters) on the summit of Antisana, evaluating the contributions of glacial runoff to the surface water hydrology, and conducting the first characterization of the chemical content of surface waters in the Paramo. The success of the Antisana water diversion has resulted in proposals to expand existing uses of glacial meltwater and a call for additional water diversions and hydroelectric plants in Ecuador using glacial runoff. Quito, the capital of Ecuador, now gets signicant amounts of municipal and industrial water from the volcano Antisana's glacial runoff. snobear.colorado.edu /Markw/Research/southamerica.html   (276 words)

MSU watershed hydrology publications Quantification of tracer and runoff response across catchment scale. Scale effects on headwater catchment runoff timing, flow sources, and groundwater-streamflow relations. A combined tracer and runoff transfer function approach. landresources.montana.edu /watershed/Publications.htm   (276 words)

ARS : Robert D Wauchope Rahman, A.G., Wauchope, R.D., Truman, C.C., Dowler, C.C. Runoff and leaching of atrazine and alachlor on a sandy soil as affected by irrigation. Wauchope, R.D., Sumner, H.R., Truman, C.C., Johnson, A.W., Dowler, C.C., Hook, J.E., Gascho, G. J., Davis, J.G., Chandler, L.C. Runoff from a cornfield as affected by tillage and corn canopy: a large-scale simulated-rainfall hydrologic data set for model-testing. SENSEMAN, S., MUELLER, T., REILEY, M., WAUCHOPE, R.D., CLEGG, C.M., YOUNG, R., SOUTHWICK JR, L.M., MOYE, A., DUMAS, J., MERSIE, W. Modeling Hydrology, Metribuzin Degradation, and Metribuzin Transport in Macroporous Tilled and No-Till Silt Loam Soil Using Rzwqm www.ars.usda.gov /pandp/people/people.htm?personid=5945   (276 words)

EarthRef.org Reference Database (ERR) -- Zierl & Bugmann 2005 Alpine region, climate change, ecohydrology, land use change, runoff regimes, snow cover, Hydrology, Streamflow, Global Change, Biogeochemical cycles, processes, and modeling, Catchment, Eco, hydrology, Impacts of global change The overall effect is a substantial runoff regime shift across the Alps, with specific differences depending on the climatic zone considered. The focus was on analyzing differences in the hydrological responses of different Alpine climate zones, exploring differences between SRES scenarios (A1FI, A2, B1, and B2), and analyzing the importance of applying several global circulation models (HadCM3, CGCM2, CSIRO2, and PCM). earthref.org /cgi-bin/err.cgi?n=85517   (252 words)

Glen E. Liston - The Pielke Research Group at Colorado State University Liston, G. Sud, and E. Wood, 1993: A runoff routing model for validating general circulation model land surface hydrology parameterizations. E. Liston, 1996: Melting, runoff and the formation of frozen lakes in a mixed snow and blue-ice field in Dronning Maud Land, Antarctica. Liston, G., and W. Lau, 1992: GCM land surface hydrology parameterizations. blue.atmos.colostate.edu /projectmembers/liston.shtml   (6935 words)

National Weather Service Hydrology Laboratory Within each element, a fast runoff is routed over conceptual hillslope to a channel, and then channel inflow combined with a slow runoff component and upstream pixel outflows is routed through a pixel conceptual channel. The main goal of the HLRMS was to generate a flexible system that can easily incorporate different parameterizations of rainfall-runoff and routing processes. Selected grids (input variables, states, water balance components) can be stored in an Arc/Info format for a selected period with desirable time interval. www.nws.noaa.gov /ohd/hrl/distmodel/rms.html   (6935 words)

AGWT Glossary of Terms A more general term than runoff, streamflow may be applied to river discharge whether or not it is affected by diversion or regulation. On the other hand, geohydrology is a term used to describe the study of hydrology from the perspective of the influences of geology. In hydrology, it is generally applied to the water flowing in a natural channel as distinct from a canal. www.agwt.org /info/glossary.asp   (6935 words)

NRCS National Water and Climate Center Technical Release No. 20: Computer Program for Project Formulation Hydrology (TR-20) is a physically based watershed scale runoff event model. The Hydrology Branch of the SCS (forerunner of NRCS) in cooperation with the Hydrology Laboratory (ARS) developed the original FORTRAN computer program through a contract with C-E-I-R, Inc. in 1964. The original version ran on an IBM 1620 mainframe computer. www.wcc.nrcs.usda.gov /hydro/hydro-tools-models-tr20.html   (222 words)

Pubs.GISS: Publications by Gary L. Russell Calculations of river-runoff in the GISS GCM: Impact of a new land-surface parameterization and runoff routing model on the hydrology of the Amazon River. Russell, G.L., J.R. Miller, and L.-C. Tsang 1985. Russell, G.L., V. Gornitz, and J.R. Miller 2000. pubs.giss.nasa.gov /authors/grussell.html   (1408 words)

SNOWMELT WATER AND ENERGY FLUX UNDER EPHEMERAL PONDS IN THE CANADIAN PRAIRIES These ephemeral ponds are short-lived (< 1 month) but play an important role in the hydrology and ecology of the prairies, by storing runoff water, recharging soil moisture and shallow groundwater, and by providing food and habitat for many organisms. Snowmelt runoff in the prairies occurs on the frozen ground and flows into depressions to form ponds. The Northern Prairies region of North America is characterized by undulating topography with numerous hydrologically closed depressions. gsa.confex.com /gsa/2003AM/finalprogram/abstract_59886.htm   (455 words)

McMurdo LTER Data Sets The glaciers of the McMurdo Dry Valleys are fundamental to the hydrology and biology of the valleys because they are the only significant source of water to the valley streams and lakes. Therefore, understanding the controls on the glacial extent and meltwater runoff is fundamental to a process-oriented approach to studying the dry valleys ecosystem. This data also clarifies the spatial and temporal changes on the glaciers and with climate data furthers our understanding of how small changes in the climate can have large-scale affects on glacier runoff. huey.colorado.edu /LTER/glcrdata.html   (455 words)

Glacier Listing Tangborn, W.V., 1980, Contribution of glacier runoff to hydroelectric power generation on the Columbia River: in Proceedings of the International Symposium on the Computation and Forecasts of Runoff from Glacier and Glacierized Areas, Tbilisi, 1978: USSR Academy of Sciences, Section of Glaciology, Data of Glaciological Studies Publication 39, p. Williams, R.S., Jr., and Ferrigno, J.G., 1981, Satellite image atlas of the Earth's glaciers, in Deutsch, Morris, Wiesnet, D.R., and Rango, Albert, eds., Satellite hydrology: William T. Pecora Memorial Symposium on Remote Sensing, 5th, Sioux Falls, South Dakota, 1979, Proceedings, p. Krimmel, R.M., 1982, Water-supply from the glaciers of Xizang [abs.], in Proceedings of Symposium on Qinghai-Xizang (Tibet) Plateau: Peking, Sinica Academy, p. ak.water.usgs.gov /Publications/Glaciers/glacier_listing.htm   (12444 words)

Publications Hromadka II, T.V. and McCuen, R.H., 1989, Evaluation of Rainfall-Runoff Performance Using the Stochastic Integral Equation Method, Stochastic Hydrology and Hydraulics, Vol. Hromadka II, T.V., Yen, C.C. and Whitley, R.J., 1993, Hydraulic Junction Analysis for a Hydrologic Confluence, Proceedings: Stochastic and Statistical Methods in Hydrology and Environmental Engineering, June 21-23, 1993, University of Waterloo, Waterloo, Canada (Springer-Verlag). Hromadka II, T.V., 1994, The Approximate Boundary Method for Error Reduction in the Complex Variable Boundary Element Method: Overview, Proceedings: International Association for Mathematics and Computers in Simulation (IMACS) Conference, Atlanta, Georgia, July 1994, pg. www.hromadka.net /Publications.html   (8902 words)

ARS : Randall G Williams Gilbert, J.K., Sims, T.J., Lowrance, R.R., Williams, R.G. Using the riparian ecosystem management model (remm) to assess the effect of vegetated filter strips on phosphoros losses in runoff. SHERIDAN, J.M., BOSCH, D.D., WILLIAMS, R.G. Evaluation of the Riparian Ecosystem Management Model (Remm): I. Hydrology LOWRANCE, R.R., WILLIAMS, R.G., INAMDAR, S., BOSCH, D.D., SHERIDAN, J.M. Peanut Cropping-Tillage System Effects on Runoff and Sediment Yield www.ars.usda.gov /pandp/people/people.htm?personid=6115&pf=1   (593 words)

5 This design is based on the assumption that the overland flow observed on the upslope trough is an estimate of the runon to a 250 m2 plot and that the runoff from the plot is monitored by the downslope trough. Both tropical rainforest and open eucalypt woodland generate large volumes of overland flow in the summer wet season, with the former environment presenting the paradox of high surface infiltration rates typical of forested environments but a runoff response that is not typical of these environments. The process hydrology studies described here have shown that widespread saturation overland flow can occur within tropical rainforest where prevailing rain intensities are high and subsoil K* are very low, away from the surface horizons containing biological activity. www.unesco.org.uy /phi/libros/manaos/5.html   (593 words)

USGS Water Resources of Virginia (WRD Virginia District Public Page) Newsitems 2003 It’s important to collect samples during floods when water quality is affected by increased runoff that carries sediment, fertilizer, and other land-applied chemicals. Speiran also talked to the class about how to evaluate the hydrology of a site and then design a well network based on that hydrology. At the "Environment Virginia 2003" conference held at Virginia Military Institute, USGS hydrologists David Nelms and Karen Rice helped lead a field trip to Big Spring, Buena Vista (pictured), Glasgow, Natural Bridge, and Natural Bridge Caverns. va.water.usgs.gov /index_newsitems.html   (685 words)

Soil Moisture Soil moisture has many possible applications in hydrology, but the primary areas are in evaporation and runoff modeling. The major factor inhibiting wide spread use of remotely sensed soil moisture data in hydrology is the lack of data sets and optimal satellite systems. Although it is believed that an L-band system would be optimum for soil moisture, the preliminary results from the ERS-1 demonstrate its capability as a soil moisture instrument. www.agu.org /revgeophys/engman00/node5.html   (685 words)

Soil Moisture Soil moisture has many possible applications in hydrology, but the primary areas are in evaporation and runoff modeling. The major factor inhibiting wide spread use of remotely sensed soil moisture data in hydrology is the lack of data sets and optimal satellite systems. However, only microwave technology has demonstrated a quantitative ability to measure soil moisture under a variety of topographic and vegetation cover conditions so that it could be extended to routine measurements from a satellite system [ Engman, 1990 ]. www.agu.org /revgeophys/engman00/node5.html   (685 words)

1.5 Modling the Continental Hydrology: The Interplay Between Cnopy Interception and Hill-slope Runoff (2004 - 18Hydro) Modling the Continental Hydrology: The Interplay Between Cnopy Interception and Hill-slope Runoff 1.5 Modling the Continental Hydrology: The Interplay Between Cnopy Interception and Hill-slope Runoff (2004 - 18Hydro) ams.confex.com /ams/84Annual/techprogram/paper_72192.htm   (685 words)

Porous Pavement Research Porous pavement is a best management practice for urban stormwater that has the potential to meet the key stormwater management objectives of peak discharge control, pollutant removal and runoff volume reduction. The focus of this research is on the conjunctive use of porous and impervious pavements, with the porous pavement acting as a treatment device for impervious area runoff. As part of the Cooperative Research Centre for Catchment Hydrology's urban stormwater program, a post-graduate research project is currently investigating the effectiveness of lattice-type porous pavements in meeting these objectives. www.ens.gu.edu.au /eve/research/PorousPavement/PPSite.html   (693 words)

Application of Diffusive Tank Model in Drainage Analysis Of Paddy Fields Surface Water Hydrology, Modeling, Rainfall/Runoff Simulation, Diffusive Tank Model, Paddy Field A diffusive tank model has been successfully applied to the simulation of runoff from paddy fields in Japan because it can well describe the features of local water flows. The main goal of the study is to evaluate the performance of the diffusive tank model with the calibrated parameters obtained in Jyau-Shi to simulate discharge from paddy fields in two experimental catchments located in the areas of Shing-Ying and Ta-Liao, Southwestern Taiwan. www.awra.org /~awra/jawra/papers/J03060.html   (176 words)

mcdonnell.doc We argue that this method is the necessary dialog that should occur between the modeler and the experimentalist to enable a better process representation of catchment hydrology in conceptual runoff models. The experimentalist often has a highly detailed yet highly qualitative understanding of dominant runoff processes—thus there is often much more information content on the catchment than we use for calibration of a model. We present a new method where soft data (i.e., qualitative knowledge from the experimentalist that cannot be used directly as exact numbers) are made useful through fuzzy measures of model-simulation and parameter-value acceptability. www.fsl.orst.edu /~bond/phystalk/Ecohydrology/mcdonnell.doc   (176 words)

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