The accurate estimation of the hydrologic response in water resources planning and development is crucial. In this study, rainfall-runoff relationship Devgadh Baria watershed Panam river catchment were investigated. Due to limited availability accuracy runoff data, Clark UH, SCS UH models explored for estimation. Remote sensing GIS techniques integrated assess ungauged Middle Gujarat region.&#x...

Abstract In this research, a new conceptual model for producing instantaneous unit hydrographs (IUHs) is introduced by linear combination of the Nash model, which assumes that discharge from reservoir function its storage, and called inter-connected (ICLRM), difference storage adjacent downstream reservoir. By employing these assumptions, system first-order differential equations with three deg...

land use change is one of the main factors in the process of changing the regime of flood in watersheds. taleghan watershed has been subjected to many land use changes over years, which probably effects on flood characteristics of taleghan river. in present study the effects of land use change on some parameters including peak flow, volume and flood base time, in part of taleghan basin, was inv...

Global optimization methods linked with simulation models are widely used for automated calibration and serve as useful tools for searching for cost-effective alternatives for environmental management. A genetic algorithm (GA) and shuffled complex evolution (SCE-UA) algorithm were linked with the Long-Term Hydrologic Impact Assessment (L-THIA) model, which employs the curve number (SCS-CN) meth...

The NRCS-CN (Natural Resources Conservation Service curve number) method, developed by the USDA (U.S. Department of Agriculture) is among most widely used for estimation surface runoff from watersheds. Ever since its introduction in 1950s, although it has been to a great extent engineers and hydrologists, applicability original procedure determine main parameter, number (CN), various regions wi...

Infiltration phenomenon, has a direct impact on rainwater harvesting in fields under irrigation. In order to solve this problem (reduced infiltration and increased runoff), a few strategies can be suggested. Taking long-term decision for increasing the efficiency of irrigation should be strongly suggested. At the same time, ways in which customized irrigation is optimized must be studied. An ol...

Hydrologic Engineering, April __________________________________________________________________________________ DESIGN RAINFALL CURVE James C.Y. Guo, Professor, Civil Engineering, U. of Colorado at Denver. __________________________________________________________________________ Abstract To design urban storm water infrastructures, hydrologists apply the SCS Type I and II 24-hr rainfall distr...

ABSTRACT- To study the effect of tree roots on increasing water infiltration in soil and also to determine and assess the coefficients of different infiltration models, some infiltration tests were performed in three tree plantation areas in Badjgah, Fars province with different soil textures (clay loam for pear plantation, sandy loam for grape plantation, loamy sand for pine trees). In each pl...