Stochastic Integral Equations and Rainfall-Runoff Models

Hromadka, T.V.; Whitley, Robert

doi:10.1007/978-3-642-49309-6

Cited by 13 publications

(3 citation statements)

References 36 publications

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“…In spite of its importance, however, runoff is a poorly understood phenomenon in that our predictive capabilities are mediocre at best (Hromadka and Whitley 1989), especially in arid and semiarid landscapes (Yak and Lavee 1985). A process-based understanding of runoff (i.e., one capable of prediction) is needed for effective evaluation and resolution of the myriad environmental problems that characterize semiarid landscapes (National Research Council 1991).…”

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confidence: 99%

Runoff and Erosion in Intercanopy Zones of Pinyon-Juniper Woodlands

Wilcox¹

1994

Journal of Range Management

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have been compacted by repeated rainfall.In semiarid pinyon-juniper environments, the principal mechanisms of redistribution of water, sediments, nutrients, and contaminants are runoff and erosion. To study the phenomena underlying these mechanisms, we established six 30-m' plots, in intercanopy zones, for monitoring over a 2-yr period (1991)(1992)(1993). Two of the plots were severely disturbed; 4 were undiiturbed.

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confidence: 99%

Runoff and Erosion in Intercanopy Zones of Pinyon-Juniper Woodlands

Wilcox¹

1994

Journal of Range Management

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“…The application of this model relies on the determination of the curve number which is a function of land use, hydrological soil groups and antecedent moisture content. Values of CN are widely documented in the literature (Hromadka & Whitley, 1989;Chow et al, 1988). An equation can also be derived from the simultaneous solution of the above three expressions which relates curve number to storm rainfall and runoff and is expressed as follows for <j> = 0.2:…”

Section: Discussionmentioning

confidence: 97%

Simulation of direct runoff volumes and peak rates for rural catchments in Kenya, East Africa

Onyando

Sharma

1995

Hydrological Sciences Journal

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Estimation of direct runoff volume and peak runoff rates for small rural catchments in Kenya, East Africa, poses a problem in view of the limited gauged data available. The problem can be circumvented by adopting a modelling approach. This, however, does require some base data for model calibration and validation. A highly reliable data base for two small catchments, Sambret (7.02 km 2 ) and Lagan (5.44 km 2 ), for nearly 22 years is used in the present study. These catchments lie in the headwaters of the Lake Victoria drainage basin in Kenya and were intensively instrumented by the former East African Agricultural and Forestry Research Organisation (E A AFRO). In the Sambret catchment, 41 rainfall-runoff events were available, out of which 25 were used for model calibration while the other 16 were used for validation. To further verify the applicability of the models to different catchments, 18 events from the neighbouring Lagan catchment were also used. The SCS curve number procedure proposed by the United States Soil Conservation Service was used to estimate the direct runoff volumes. The curve numbers were derived from storm rainfall-runoff relationships and the results obtained were satisfactory. Peak runoff rates were derived by both Nash and kinematic wave models for the estimated runoff volumes. The Nash model gave acceptable results in both Sambret and Lagan. The kinematic wave model performed well in Sambret only; in Lagan, it under-predicted the peak runoff rates.

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“…In order to model the hydrology in the area of study, interception, surface storage, infiltration, and rainfall-runoff process were considered. Interception and surface storage were determined using land cover map and parameters recommendation by Hromadka and Whitley (1989), Tsihrintzis andHamid (2001), andRossman (2015). For each type of coverage Manning roughnesses were identified, in accordance with the recommendations of the United States Department of Agriculture (USDA-ARS, 2008).…”

Section: Hydrodynamic Modelingmentioning

confidence: 99%

Assessment of Storm Floods in a Small Tropical Andean Basins

Nájera

Rey

2022

Front. Clim.

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The increase in urbanization processes has considerably changed urban flows, as basin impermeabilization generates increased surface runoff volumes. This induces storm floods that simultaneously generate mobility problems, infrastructure damage, and in extreme conditions, pedestrian deaths. This problem has been widely studied. For small basins with steep watersheds, however, there is little literature to be found. In these basins, the problem is even more complex, as flows are faster and more energized, given the surface slopes, which generates further problems, including drainage infrastructure damage, landslides, and fallen trees. Many solutions have been proposed, which include Sustainable Urban Drainage Systems (SUDS), which work together with the drainage network. These were studied in the present investigation, via the modeling of a basin with those characteristics typical of mountains, using SWMM's Low Impact Development LID model. It was found that rain barrels and green roofs were viable solutions, independently, although the application of additional techniques, such as cisterns and bioretention cells, is also indispensable. The present study also concludes that, although the techniques studied are implemented on a small scale, these should be both planned and implemented by municipal authorities.

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Stochastic Integral Equations and Rainfall-Runoff Models

Cited by 13 publications

References 36 publications

Runoff and Erosion in Intercanopy Zones of Pinyon-Juniper Woodlands

Runoff and Erosion in Intercanopy Zones of Pinyon-Juniper Woodlands

Simulation of direct runoff volumes and peak rates for rural catchments in Kenya, East Africa

Assessment of Storm Floods in a Small Tropical Andean Basins

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