Simulating Effect of Channel Changes on Stream Infiltration

Losses of flood water from alluvial channels

“…As expected, large flood volumes can lead to increased inundation of the width of the channel, increasing the wetted perimeter and consequently providing a larger surface for water infiltration (Reeder, 1981;Guzman et al, 1989;Parissopoulos & Wheater, 1991). The magnitude of transmission losses in relation to increases in the channel wetted area is also dependent on the bed material characteristics and the initial moisture conditions.…”

“…These parameters acting interdependently, as well as complicated initial and boundary conditions, make it difficult to arrive at simple analytical solutions for the estimation of channel abstraction. Only a few studies have addressed the subject of infiltration from dry wadi channels using analytical or numerical techniques (Abdulrazzak & Morel-Seytoux, 1983;Freyberg, 1983;Morel-Seytoux et al, 1990;Guzman et al, 1989;Parissopoulos & Wheater, 1991). The derived solutions require various soil and flood hydrograph parameters that are usually lacking in arid regions.…”

Investigation of the hydrodynamics of flash floods in ephemeral channels: Scaling analysis and simulation using a shock-capturing flow model incorporating the effects of transmission losses

“…The infiltration rate will depend on the hydraulic conductivity of the bed sediments. While Guzman et al (1989) considered the increase in infiltration due to an increase in the wetted surface at a one-dimensional cross section, and found increasing wetted area increased the infiltration volume, their work did not consider the effects of the change in wetted perimeter on the downstream propagation distance of a flash flood. A volume ratio, f V , is defined as the ratio of the total volume of water infiltrated to the total volume of water that has passed through the upstream boundary.…”

Infiltration-recharge through wadi beds in arid regions

“…The infiltration-recharge process was addressed by several researchers through analytical and numerical approaches (Abdulrazzak & Morel-Seytoux, 1983;Besbes et al, 1978;Flug et al, 1980;Freyberg, 1983;Morel-Seytoux et al, 1990;Moench & Kisiel, 1970;Parissopoulos & Wheater, 1991;and Guzman et al, 1989). Field investigations were carried out by Sophocleous & Perry (1985), Steenhuis et al (1985), Stephen & Knowlton (1986) and Crerar et al (1988).…”