نتایج جستجو برای: hydrologic engineering centre hydrologic modeling system hec hms

تعداد نتایج: 2784980  

Journal: :Environmental Modelling and Software 2014
Heather E. Golden Charles R. Lane Devendra M. Amatya Karl W. Bandilla Hadas Raanan Kiperwas Christopher D. Knightes Herbert Ssegane

Geographically isolated wetlands (GIW), depressional landscape features entirely surrounded by upland areas, provide a wide range of ecological functions and ecosystem services for humanwell-being. Current and future ecosystem management and decision-making rely on a solid scientific understanding of how hydrologic processes affect these important GIW services and functions, and in turn on how ...

Journal: :International Journal of Research in Engineering and Technology 2014

دل افروز, هادی, فاضلی فرد, محمدحسن, قاهری, عباس, قربانی, محمدعلی,

One of the challenges for hydrologists is finding a new method for hydrologic classification of catchments. An appropriate classification method can be effective in many branches of hydrologic science like modeling. To deal with the complexity and nonlinearity of hydrologic processes, some researchers have proposed using the chaos theory for catchment classification. In this research, possibili...

Journal: :Water 2023

In this study, a comprehensive methodology was adapted to determine the environmental flow regime of “La Yerbabuena”, temporary stream located in Aguascalientes Valley, Mexico. The analysis divided into four stages: geomorphological watershed analysis, hydrologic hydraulic modeling, and analysis. main features study area were defined from maps spatial block, with them, synthetic series daily mo...

Journal: :جنگل و فرآورده های چوب 0
مریم مرادنژادی دانشجوی کارشناسی‏ ارشد مهندسی جنگل، دانشکدة منابع طبیعی دانشگاه تهران، کرج، ایران مقداد جورغلامی دانشیار گروه جنگل داری و اقتصاد جنگل، دانشکدة منابع طبیعی دانشگاه تهران، کرج، ایران آرش ملکیان دانشیار گروه احیاء مناطق خشک و کوهستانی، دانشکدة منابع طبیعی دانشگاه تهران، کرج، ایران

soil conservation service curve number method (scs-cn) is a widely applied technique for predicting direct runoff from rainfall has been used around the world. in this study, the curve number maps and entry physical model data of kheyrud basin to hec-hms model, the hec-geohms extension in arcgis software and google earth satellite images were used. in addition to the statistical analysis of sur...

Journal: :caspian journal of environmental sciences 2010
v. gholami m. mohseni saravi

urbanization is a pervasive global trend. the development of residential areas and road network in hajighoshan watershed (northern iran) has been observed in the recent several decades. the objective of this study is the quantitative investigation of the effects of impervious surfaces development and urban development on runoff generation and flood hazard. the study of urban area development wa...

Journal: :Journal of Flood Risk Management 2021

Digital surface models, land use and rainfall data were used to simulate water areas using Hydrologic Engineering Centres River Analysis System (HEC-RAS) software. Multi-temporal synthetic aperture radar (SAR) was for the detection of flood prone area calibrate HEC-RAS, due lack validation in New Cairo City, Egypt. The thresholding method applied two Sentinel-1 images, one pre- post-flash event...

Urbanization is a pervasive global trend. The development of residential areas and road network in Hajighoshan watershed (northern Iran) has been observed in the recent several decades. The objective of this study is the quantitative investigation of the effects of impervious surfaces development and urban development on runoff generation and flood hazard. The study of urban area development wa...

2005
Jasper A. Vrugt Cees G. H. Diks Hoshin V. Gupta Willem Bouten Jacobus M. Verstraten

[1] Hydrologic models use relatively simple mathematical equations to conceptualize and aggregate the complex, spatially distributed, and highly interrelated water, energy, and vegetation processes in a watershed. A consequence of process aggregation is that the model parameters often do not represent directly measurable entities and must therefore be estimated using measurements of the system ...

2005
James W. Kirchner

[1] The science of hydrology is on the threshold of major advances, driven by new hydrologic measurements, new methods for analyzing hydrologic data, and new approaches to modeling hydrologic systems. Here I suggest several promising directions forward, including (1) designing new data networks, field observations, and field experiments, with explicit recognition of the spatial and temporal het...

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