modeling the hydraulic geometry of gravel rivers is of intrest to hydraulic engineers, hydrologists and enviromental scientists who are engaged in predicting the adjustments of an alluvial channel to an altered upstream runoff or sediment supply. the widely used qualitative and regime models, while indicating the general direction of river adjustment, are not able to deal with river response at...

Bottomland hardwood forests are highly productive ecosystems located along the floodplains of rivers and streams throughout the central and eastern United States (Hodges, 1994). These ecosystems provide important functions including hydrologic flux and storage, biological productivity, biogeochemical cycling and storage, decomposition and wildlife habitat (Richardson, 1994). Bottomland hardwood...

River deltas and alluvial fans have channelization and deposition dynamics that are not entirely understood, but which dictate the evolution of landscapes of great social, economic, and ecologic value. Our lack of a process-based understanding of fan dynamics hampers our ability to construct accurate prediction and hazard models, leaving these regions vulnerable. Here we describe the growth of ...

introduction interaction between internal and external processes of the earth during time plays an important role in formation and landforms transformation. we can identify course of their process changes with landform survey. in the middle parts of iran, there are several geomorphologic evidence of arid and rainy climate changes. playaes and lakes or generally internal holes had an important r...

the alluvial fan of shahdaad in derakhtangaan river is one of the biggest alluvial fans in a dry area in northeastern kerman. this alluvial fan has been formed due to different material erosions in the drainage basin of derakhtangaan river and lying of these materials in the extreme part of this basin called dasht-e-lut (the plain of lut). the region which has been studied in this research is o...

The changes in channel geometry downstream of Hapcheon Dam, South Korea, are closely examined. Daily pulses of water from peak hydropower generation and from sudden sluice gate operations affect the 45-km reach of the Hwang River between the Hapcheon Reregulation Dam and the Nakdong River. From 1983 to 2003, the median bed-material size, d50, increased from 1.0 to 5.7 mm, and the bed slope of t...

This article presents the geomorphological mapping of Kalamas river delta in Thesprotia (Epirus, north-western Greece). The (also known as Thyamis) is one three main deltas this region. Detailed was performed through analysis field surveys and interpretation old maps, satellite images, aerial photos, DEM. evolution well its current morphology derives from complex interactions between alluvial, ...

the aim of this paper is to evaluate the effect of tectonic on the volume of alluvial fans around danehkhoshk anticline. to achieve the purpose of this study, at first, borders, sweep angle(s) and radius(r) of alluvial fans were obtained based on quick bird satellite image and then difference in the altitude between the apex and toe of alluvial fans (h) were calculated based on topographic map ...

Recent surface observations have emphasised the importance of bedload transport by rivers and streams on Mars Titan. Previous “hydraulic” analysis, however, has also shown that as suspended load should be possible, if not more prevalent due to lower critical shear stresses, under reduced gravity conditions compared with Earth; where dominant mode sediment flux is load. A new suspended-load equi...