Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 20 of 23 for “"Flash Floods"”.
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A study of flash floods on a small drainage area
An investigation was made of the flash flood of July 9, 1943, on the Blacksburg watershed with a view toward an approximation of the actual amount of water passing as run-off during the storm, as well as the peak rate of flow. All the available data have been reviewed with the above purpose in …
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Modeling Flash Floods in Small Ungaged Watersheds using Embedded GIS
Effective prediction of localized flash flood regions for an approaching rainfall event requires an in-depth knowledge of the land surface and stream characteristics of the forecast area. Flash Flood Guidance (FFG) is currently formulated once or twice a day at the county level by River Forecast …
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An automated system to detect flash floods and alert at-risk communities
… automated monitoring station designed to detect flash floods occurring in the Rio Aguan river basin, Honduras. An Atmel microcontroller polls a series of sensors in the river, logging all data for later hydrological analysis and modeling. A high-power APRS radio is used to alert a central …
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Flash Flooding in Eastern Kentucky: An Analysis of the 3-4 August 2001 Event
Limited research exists concerning flash flooding in the United States. However, flash floods can occur anywhere and cause more fatalities than any other weather related natural disaster. Eastern Kentucky experienced an average of 41 flash floods per year (1993-2002), yet little research exists for …
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Early warning system guidance to mitigate flash flood impacts in Petra region, Jordan
… occurrence of natural disasters; especially flash floods, are resulting the significant threats to many countries around the world. The truth that cannot be ignored, is that the effects of flash floods on the developing countries’ societies and economies are massive, compared with developed …
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Remote Sensing For An Improved Geospatial Flash Flood Susceptibility Modeling Over An Arid Environment
Flash floods are the foremost cause of irretrievable environmental damage in the arid Arabian Peninsula. The better understanding of the geomorphologic, topographic, climatic, and hydrologic characteristics of a selected watershed, and determining their geospatial relationships with respect to the …
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Recreational disturbance of a desert stream fish community: Detecting ecological effects of environmental impact
… in pools experiencing recreational disturbance. Flash floods at the end of the summer appeared to "reset" the system, redistributing fish in the river and resulting in similar communities throughout the study area. Results suggest that recreational activities do disturb native fish communities …
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Feedback between erosional morphology, sediment transport and abrasion in the transient adjustment of fluvial bedrock channels
… but prolonged flood due to snowmelt flow. Large flash floods can be net depositors of coarse sediment in the channel, mantling the channel bed with coarse sediment and inhibiting erosion.
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The Cultural-Social Benefits of Developing Green Channels: Case Studies and Demonstration in Jeddah City, Saudi Arabia
… efficient solution to help prevent an area from flash floods and water accumulation. However, such a solution does not take into consideration the increased land needs for housing and public open spaces, in addition to missing the opportunity for benefitting from rainwater and reusing the …
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Inundações e mapeamento participativo na localidade de Baixa de Santa Rita - Salvador/BA
… It focuses on hydrological disasters, such as floods, floods and flash floods, which cause material damage and disturbances in urban dynamics. The main objective of the research is to analyze the distribution of areas susceptible to flooding in the locality of Baixa de Santa Rita, in Salvador, …
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METAL BIOGEOCHEMISTRY OF A MINE CONTAMINATED EsTUARiNE-CoASTAL SYSTEM IN SW SPAIN
… U . The seasonal cycle of low precipitation and flash floods was identified as an important factor in generating the more severe contamination of the rivers with Fe, A l , Mn, Zn, Cu, N i , Co and Cd observed during autumn and winter, compared to spring and summer. The estuarine behaviour of …
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Watershed-scale patterns of seaward migration in Lentipes concolor, a Hawaiian stream goby
… related to the high frequency and intensity of flash floods that may disrupt the sequence of courtship and spawning behavior of adult L. concolor. Chapter 4 discusses ways in which the new information contained in the previous two chapters may change current paradigms regarding the population …
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Online flood forecasting in fast responding catchments on the basis of a synthesis of artificial neural networks and process models
… especially restrict the potential for real time flash flood forecasting, namely the considerable computational requirements together with the rather cumbersome operation of reliable physically based hydrologic models. The new PAI-OFF methodology (Process Modelling and Artificial Intelligence for …
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Palaeoenvironmental change from the Hettangian to Toarcian in Moyeni (Quthing District), southwestern Lesotho
… that in the Hettangian the area was prone to flash floods and drying in a low energy depositional system with small rivers and shallow lakes. The bulk of the Clarens Formation comprises very thick, tabular, fine- to medium-grained, massive to large-scale cross-bedded arenites. However, the …
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Large-scale conditions that result in wet summers over arid Western Southern Africa
… it is prone to highly variable rainfall and flash floods, impacting vulnerable communities and unique ecosystems. The recent extreme rainfall during 2020/21 and 2021/22 have highlighted the impacts such wet summers can have on vulnerable communities. However, it is not only the rainfall …
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CLIMATE CHANGE IMPACT ON URBAN STORMWATER SYSTEM AND USE OF GREEN INFRASTRUCTURE FOR ADAPTATION: AN INVESTIGATION ON TECHNOLOGY, POLICY, AND GOVERNANCE
… efficiently mitigates the problem of flash floods in urban areas, it results in multiple other adverse environmental consequences such as loss of freshwater from urban landscapes, transfer of pollutants to receiving waters, and an increased potential of downstream flooding. Green …
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Modelli di preannuncio delle piene in piccoli bacini ed incertezze legate alla densita' della rete pluviometrica.
… responding geomorphology are commonly prone to Flash Floods, which have to be predicted on the basis of meteorological forecast and radar nowcasting, rather than continuously monitoring river water levels. Moreover, real-time rainfall observations at high resolution in time and space are …
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Climate change vulnerability assessments in the regional context
… implies that for each considered impact (e.g. flash floods) a clear sensitive entity is defined (e.g. settlements) and related to a direction of change for a specific climatic stimulus (e.g. increasing impact due to increasing days with heavy precipitation). Regarding the challenging …
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MODERN AND INDIGENOUS KNOWLEDGE OF CLIMATE CHANGE AND GLACIER MARRIAGE IN GILGIT-BALTISTAN, PAKISTAN.
… climate hazards such as glacial lake outburst floods, flash floods, and extreme weather events have intensified water scarcity and disrupted livelihoods. Local communities understand these shifts through spiritual, ecological, and cultural lenses. For them, climate change is not just a physical …
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