Storage analyses for ephemeral streams in semiarid regions
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U.S. Geological Survey, Open-File Services Section, Western Distribution Branch , Cheyenne, Wyo, Lakewood, Colo
Ephemeral streams -- United States., Water -- Storage -- United St
|Statement||by Kent C. Glover.|
|Series||Water-resources investigations report -- 83-4078.|
|Contributions||Geological Survey (U.S.)|
|The Physical Object|
|Pagination||v, 55 p. :|
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Get this from a library. Storage analyses for ephemeral streams in semiarid regions. [Kent C Glover; Geological Survey (U.S.)]. Floods are relatively rare events for semi-arid karst regions; however, they can be really severe and disruptive, causing serious damages to people and infrastructures.
This work presents an analysis of the response to rainfall of ephemeral streams in a karst semi-arid regions of southeast of Italy by an innovative by: Significance of Ephemeral and Intermittent Streams in the Arid and Semi-arid American Southwest.
U.S. Environmental Protection Agency and USDA/ARS Southwest Watershed Research Center, EPA//R/, ARS/, pp. iiCited by: A better understanding of the magnitude of recharge variations in semiarid and arid regions would reduce water budget uncertainty. Variability of ephemeral channel recharge with climate in southeastern Arizona was investigated through analysis of hydrologic monitoring near three ephemeral streams in southeastern Arizona during the middle to.
An ephemeral stream is one that flows only in direct response to precipitation. It receives little or no water from springs and no long-continued supply from melting snow or other sources (Bryan, ).By their nature, these streams are most common in arid and semiarid regions of the earth where precipitation is scant and a moisture deficiency exists most of the time.
Ephemeral streams are fluvial systems typical of Mediterranean and semi-arid zones. In these environments, ephemeral streams together with perennial rivers drain a large quantity of water from local areas.
Catchments are small (hundreds of km 2) and have steep slopes and braided channels. Hydrographs of ephemeral streams in arid and semiarid regions usually decrease significantly in magnitude downstream, unless augmented by tributary flows. This process, termed transmission loss, is important not only in its obvious effect on flow reduction, but also as a source of ground water recharge to underlying alluvial aquifers.
based on the linear storage model. of the ephemeral streams in the arid regions and The arid and semi-arid regions of the world are. Ecologically, IRES in tropical, alpine, karstic, and arctic regions are poorly known compared to IRES in temperate, Mediterranean, and semiarid regions (Fig. ; Chapters Chapter Chapter Chapter Chapter Chapter ).
The same geographic imbalance applies to various aspects of legislation, conservation, and management of. In humid and temperate regions, IRES are often confined to the headwaters but in many arid regions, IRES account for most of the stream length and occur throughout the network (Caruso and Haynes, ).
As in perennial rivers, the flow regime of IRES governs channel form and sediment dynamics (Godsey and Kirchner, ; Chapter ). Rapid increases in human population and land transformation in arid and semi-arid regions are altering water, carbon (C) and nitrogen (N) cycles, yet little is known about how urban ephemeral stream channels in these regions affect biogeochemistry and trace gas fluxes.
Description Storage analyses for ephemeral streams in semiarid regions PDF
To address these knowledge gaps, we measured carbon dioxide (CO2), nitrous oxide (N2O), and methane (CH4). Ephemeral and intermittent streams in arid and semi-arid regions have distinctly dif ferent characteristics from perennial streams that ar e in wetter, more humid (mesic to hydric) environments.
Arid and semi-arid regions (ASARs) around the world are already regularly facing problems of water scarcity, both for drinking water and for crops and other vegetation.
ASARs represent 35% of Earth's land, about 50 million km 2 (Ziadat et al., ). Rainfed agriculture is the predominant farming system in these areas, but aridity and climatic. Seventeen waterbodies from ephemeral streams of semiarid south-eastern Spain (‘ramblas’) were surveyed from a botanical, phycological and ecological point of view over a four-year period.
With a catchment size of about km² the Swakop River in Namibia is the largest of the country's twelve major ephemeral streams draining westwards into the Atlantic Ocean. Based on the results obtained with distributed and aggregated hydrologic models, in this paper the authors try to analyse the principal hydrologic properties and sediment transport in ephemeral streams.
Keywords: semi-arid region, sediment transport, resistance coefficient, ephemeral river, hyperconcentrated flow.  Despite existing observational networks, large‐scale flooding events in semiarid regions are poorly understood because of their infrequent occurrence and the lack of studies directed at quantifying their basic characteristics.
Given the ephemeral nature of semiarid basins, large floods are critical events which can cause significant exchanges of water, sediment, and nutrients across the. Field and documentary data from Walnut Gulch Watershed, an instrumented semiarid drainage basin of approximately km 2 (57 mi 2) in southeastern Arizona, show that 83% of the alluvium removed from the basin during a 15‐year erosion episode beginning about was excavated from the highest‐order amount of alluvium removed in the erosion episode would have been equal to a.
Most often, non-perennial streams, which can comprise in excess of 70% of total stream miles in arid and semi-arid regions, are excluded from national and regional surveys because of uncertainties. Rillito Creek is a large ephemeral stream that parallels the base of the mountains at a distance of a few kilometers and receives tributary inflow from several ephemeral streams that drain crystalline and sedimentary rocks and parts of the alluvial basin.
Basins in arid and semiarid regions are particularly suitable for similar analyses of. Kenabatho, P. K., McIntyre, N.
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and Wheater, H. () Application of generalised linear models for rainfall simulations in semi arid areas: a case study from the Upper Limpopo basin in north east Botswana. 10th BHS National Hydrology Symposium, Exeter, Sept. The report states that rainwater harvesting in hot arid and semi-arid regions should be based on the study of overland flow on porous surface, effect of surface soil treatment on quantity & quality of runoff produced and extent of land treatment to arrive at the volume of water to be conserved.
The report synthesizes current knowledge of the ecology and hydrology of ephemeral and intermittent streams in the Southwest. You may need a PDF reader to view some of the files on this page.
See EPA’s About PDF page to learn more. Ephemeral Streams Report (PDF) ( pp, 2 MB, NovemberEPA//R/). 1. Introduction. Groundwater recharge from ephemeral and intermittent systems plays an important role in sustaining water resources in arid and semiarid environments [Sophocleous, ].Quantifying the contribution from ephemeral streams to the water balance is important in such environments, where surface water resources are limited and in great demand [Winter et al., ].
International Symposium on Water Resource and Environmental Protection (ISWREP) Xi'an International Symposium on Water Resource and Environmental Protection IEEE, () Guizhi Wu, Xilai Zheng and Guoqing Lin An experimental study of unsaturated vertical infiltration based on sand samples from ephemeral streams, ().
Guertin, M. Tluczek, and W. Kepner. The Ecological and Hydrological Significance of Ephemeral and Intermittent Streams in the Arid and Semi-arid American Southwest.
U.S. Environmental Protection Agency and USDA/ARS Southwest Watershed Research Center. Impact/Purpose: This report addresses the hydrological and ecological significance of ephemeral and intermittent streams in the arid and semi-arid Southwestern United States (U.S.) for the purpose of illustrating their connection and value to perennial stream systems and other “waters of the United States” as protected under the Federal Water Pollution Control Act, otherwise known as the.
Goals / Objectives Identify the temporal and spatial variability of hydrologic pathways, particularly lateral subsurface flow in semi-arid landscapes of the Intermountain West. Initial work in the Cache valley will focus on selecting representative canyon and valley bottom sites.
The canyon site will be a zero order (ephemeral stream) basin with a steep slope and shallow soils. Stream flow in arid and semi-arid regions is usually in a form of flash floods that occur in dry bed ephemeral streams.
In this research, the three-parameter Muskingum method has been investigated as a tool for flash flood routing in arid zones using data from Yiba catchment in the Kingdom of Saudi Arabia. The method is general; it takes into account both lateral inflows from side tributaries.
-a gently sloping apron of sediment dropped by an ephemeral stream at the base of a mountain in arid or semiarid regions.
Deltas. Underwater / Lakes, Oceans-a wedge of sediment formed at a river mouth when the running water of the stream enters standing water, the current slows, the stream loses competence, and sediment settles out. Perennial streams 15 Intermittent streams 15 Ephemeral streams 15 Computation of flood-frequency discharge 15 Conclusions 16 Selected references 17 FIGURES 1.
Sketch showing commonly used reference levels 3 Photographs showing reference points for: 2. Bar geometry (A-A') in a reach of an ephemeral-stream channel in Wyom ing 3 3.
Details Storage analyses for ephemeral streams in semiarid regions PDF
 Semiarid flash floods pose a significant danger for life and property in many dry regions around the world. One effective way to mitigate flood risk lies in implementing a real‐time forecast and warning system based on a rainfall‐runoff model.Rainfall runoff collection in ephemeral streams is an objective in semi-arid zones.
Rack intake systems are proposed to collect these flash floods with intensive sediment transport. The design parameters address the problem of clogging the spacing between bars. Experiments for two different void ratio racks are shown. Flows, longitudinal slopes in the rack, and water with three gravel-sized.
nature of design.
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