Download or read book Methods for Evaluating Alluvial Fan Flood Hazards from Debris Flows in Maricopa County Arizona written by Ann Youberg and published by . This book was released on 2010 with total page 33 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Alluvial Fan Flooding written by National Research Council and published by National Academies Press. This book was released on 1996-10-07 with total page 182 pages. Available in PDF, EPUB and Kindle. Book excerpt: Alluvial fans are gently sloping, fan-shaped landforms common at the base of mountain ranges in arid and semiarid regions such as the American West. Floods on alluvial fans, although characterized by relatively shallow depths, strike with little if any warning, can travel at extremely high velocities, and can carry a tremendous amount of sediment and debris. Such flooding presents unique problems to federal and state planners in terms of quantifying flood hazards, predicting the magnitude at which those hazards can be expected at a particular location, and devising reliable mitigation strategies. Alluvial Fan Flooding attempts to improve our capability to determine whether areas are subject to alluvial fan flooding and provides a practical perspective on how to make such a determination. The book presents criteria for determining whether an area is subject to flooding and provides examples of applying the definition and criteria to real situations in Arizona, California, New Mexico, Utah, and elsewhere. The volume also contains recommendations for the Federal Emergency Management Agency, which is primarily responsible for floodplain mapping, and for state and local decisionmakers involved in flood hazard reduction.
Download or read book Flood Hazard Identification and Mitigation in Semi and Arid Environments written by Richard H. French and published by World Scientific. This book was released on 2012 with total page 237 pages. Available in PDF, EPUB and Kindle. Book excerpt: Alluvial fans are ubiquitous geomorphological features that occur throughout the world, regardless of climate, at the front of mountains as the result of erosion and deposition. They are more prominent in semi- and arid climates simply because of the lack of vegetative cover that masks their fan shapes in more humid areas. From both engineering and geological viewpoints, alluvial fans present particular fluvial and sedimentation hazards in semi- and arid regions because episodic rainfall-runoff events can result in debris, mud, and fluvial flows through complex and, in some cases, migratory channel systems. Further, in semi- and arid climates alluvial fans often end in terminal or playa lakes. Given the uniform topography of playa lakes, these features often present ideal locations for facilities such as airports; however, regardless of the engineering advantages of the topography, the episodic and often long-term flooding of these lakes attracts migratory birds. The purpose of this volume is to summarize the current state-of-the-art, from the viewpoint of engineering, in the identification and mitigation of flood hazard on alluvial fans; and to accomplish this a fundamental understanding of geology is required.
Download or read book Flood Hazards of Distributary flow Areas in Southwestern Arizona written by H. W. Hjalmarson and published by . This book was released on 1992 with total page 70 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Present Status of Management and Technical Practices on Alluvial Fan Areas in Arizona written by Robert L. Ward and published by . This book was released on 1988 with total page 260 pages. Available in PDF, EPUB and Kindle. Book excerpt: Discussions examine the history of the "404" program and evaluate its impact on highway development in Arizona and explore clarification of such key terms as "ordinary high water mark" and "headwaters." ADOT's policy for compliance with"404" program criteria is also evaluated. The report concludes with research recommendations that could enhance the ability to effectively manage the development of alluvial fans.
Download or read book Potential Flood Hazards and Hydraulic Characteristics of Distributary flow Areas in Maricopa County Arizona written by H. W. Hjalmarson and published by . This book was released on 1994 with total page 74 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Alluvial Fans written by and published by . This book was released on 1989 with total page 26 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book ASSESSMENT OF DEBRIS FLOW HAZARDS NORTH MOUNTAIN PHOENIX AZ written by Kathryn Reavis and published by . This book was released on 2014 with total page 111 pages. Available in PDF, EPUB and Kindle. Book excerpt: Population increases in many western cities have led to urban sprawl, which has been a constant issue in metropolitan Phoenix, AZ. The Metropolitan Phoenix Area (MPA) has sprawled exponentially since its initial development and in doing so has expanded into surrounding mountainous areas and onto alluvial fans. Alluvial fans, particularly in the western US, provide cooler, more scenic environments for people to live. Alluvial fans are conic-shaped features occurring in piedmont areas prone to floods and debris-flows. Debris-flows often supply large quantities of material to alluvial fans and are critical to the long-term development of alluvial fans. A key to understanding alluvial fan evolution is quantifying debris-flow dynamics above and below the fan apex. The addition of humans and built structures into these environments increases the risk of exposure to debris-flows, and therefore the vulnerability of people and their housing structures. This scenario magnifies the importance of understanding debris-flow hazards from a holistic multidisciplinary perspective. The scientific understanding of the evolution of alluvial fan systems needs to be instilled to protect society via engineered solutions and planning decisions. These management schemes must be grounded in a quantitative understanding of debris-flow behavior. A 2D debris-flow modeling approach, aided by high-resolution air-borne laser scanning (ALS) and terrestrial laser scanning (TLS) topographic data, is implemented to examine debris-flow behavior in a densely populated portion of the MPA and to assess the vulnerability of the built infrastructure to debris-flow damage. A calibrated 2D debris-flow model is developed for a recent debris-flow at an undeveloped site and applied to a developed site - Shaw Butte at North Mountain, a populated area with historical evidence of debris-flow activity. Several values were maintained from the calibrated model and these include: antecedent moisture conditions; an estimated volume; and sediment concentration by volume (Cv). Four separate scenarios were applied to the developed site with variations in precipitation events, including the historical rainstorm that initiated the debris-flow at Elephant Mountain, two higher magnitude seasonally average rainstorms, and one maximum event that made use of the largest recorded rainstorm for the area. Overall the results show that the highest debris-flow depths and velocities, and therefore the highest debris-flow intensities occur at the fan apex and within the existing debris-flow channel, directly below the fan apex. The complexity of the alluvial fan topography plays a major role in the flow direction. For instance, in all four scenarios, the flow did not exit into the developed neighborhood perpendicular to the fan apex (a northerly direction at the site), rather the topography steered flows in a northwesterly direction. Homes on the western side of the neighborhood are the most vulnerable to debris-flow inundation. The addition of impervious surfaces such as roadways on the alluvial fan also has an influence on debris-flow behavior as these areas provide an ideal surface for maintaining high velocities and therefore have an impact by amplifying the runout distances and the areal extent of inundation. The building vulnerability index results show that, depending on the magnitude of a potential debris-flow, a range of 22 to 44 homes are potentially in danger of damage. These results have scientific and applied merit. The 2D debris-flow modeling provides new insight into how drainage basin and alluvial fan topography influence debris-flow inundation, velocity, and runout. The 2D modeling coupled with the building vulnerability index provides a broader understanding of societal implications. These results are important in that they can provide communities and hazard management agencies with decision-making data and mitigation information based upon the degree of risk and therefore vulnerability associated with different debris-flow magnitudes.
Download or read book Flood Handbook written by Saeid Eslamian and published by CRC Press. This book was released on 2022-04-18 with total page 565 pages. Available in PDF, EPUB and Kindle. Book excerpt: Floods are difficult to prevent but can be managed in order to reduce their environmental, social, cultural, and economic impacts. Flooding poses a serious threat to life and property, and therefore it’s very important that flood risks be taken into account during any planning process. This handbook presents different aspects of flooding in the context of a changing climate and across various geographical locations. Written by experts from around the world, it examines flooding in various climates and landscapes, taking into account environmental, ecological, hydrological, and geomorphic factors, and considers urban, agriculture, rangeland, forest, coastal, and desert areas. Features Presents the main principles and applications of the science of floods, including engineering and technology, natural science, as well as sociological implications. Examines flooding in various climates and diverse landscapes, taking into account environmental, ecological, hydrological, and geomorphic factors. Considers floods in urban, agriculture, rangeland, forest, coastal, and desert areas Covers flood control structures as well as preparedness and response methods. Written in a global context, by contributors from around the world.
Download or read book Flood Hazard Assessment on Alluvial Fans written by Richard H. French and published by . This book was released on 1984 with total page 100 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Geomorphic Analysis of Flood Hazards on the Northern McDowell Mountains Piedmont Maricopa County written by Philip A. Pearthree and published by . This book was released on 1992 with total page 9 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Addendum to Hydrologic Analysis of Scottsdale Alluvial Fans 1 6 Maricopa County Arizona for Maricopa County Flood Insurance Study Federal Emergency Management Agency written by and published by . This book was released on 1989 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Geologic Mapping of Flood Hazards in Arizona written by John Jacob Field and published by . This book was released on 1992 with total page 16 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book A Probabilistic Model for Hazards Related to Sedimentation Processes on Alluvial Fans in Davis County Utah written by Jeffrey Ray Keaton and published by . This book was released on 1988 with total page 810 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Geomorphology and Hydrology of an Alluvial Fan Flood on Tiger Wash Maricopa and La Paz Counties West Central Arizona written by Philip A. Pearthree and published by . This book was released on 2004 with total page 40 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Surficial Processes Channel Change and Geological Methods of Flood hazard Assessment on Fluvially Dominated Alluvial Fans in Arizona written by John Jacob Field and published by . This book was released on 1994 with total page 516 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Flood plain Information Study for Maricopa County Arizona written by United States. Army. Corps of Engineers. Los Angeles District and published by . This book was released on 1967 with total page 45 pages. Available in PDF, EPUB and Kindle. Book excerpt:
