flow and sediment transport processes are different and more complex in coarse-bed rivers than in sand-bed rivers. the main goal of the present study is to evaluate different modes of sediment transport using different hydrometric and hydraulic methods, and to address the major uncertainties. four river reaches were selected as representatives of coarse-bed rivers in the northwest of iran. a se...

statistical frequency analysis is the most common procedure for the analysis of flood data at a gauged location thatin first step it is needed to select a model to represent the population. among them, the central moment has been themost common and widely used, and with the using of computers, the application of the maximum likelihood hasincreased. this research was carried out in order to reco...

The goal of the study was to estimate average monthly runoff from a basin for development pico hydropower in rural-mountainous area jungle (Satipo) on Peru. Due lack hydrometeorological data hilly and remote basins Peru, hydrological is essential determine hydroenergy potential basin. First, geomorphological parameters (shape relief parameters) were determined and, subsequently, precipitation a...

Due to the design of peanut harvesters and cleaners, pods are often mixed with soil, gravel, straw, other impurities. To solve this problem, study focused on designing a pod cleaning device by integrating negative pressure centrifugal fan, hydrometric sieve, reversible long-mesh sieve. The relative motion sieve was discussed, its stress analyzed, parameters fan determined, operation monitored u...

Having reliable water monitoring networks is an essential component of water resources and environmental management. A standardized process for the design of water monitoring networks does not exist with the exception of the World Meteorological Organization (WMO) general guidelines about the minimum network density. While one of the major challenges in the design of optimal hydrometric network...

This is an updated and extended presentation of the results of the IAHS Workshop on Quality Assurance in Hydrologie Measurement, held during the XXI General Assembly of the International Union of Geodesy and Geophysics (IUGG), Boulder, Colorado, USA, in July 1995. The main focus at Boulder was on experience with hydrological applications of the international standard ISO 9002 and developments i...