INTEGRATION OF GEOGRAPHIC INFORMATION SYSTEMS TECHNOLOGY AND FLOOD ANALYSIS FOR GEOLOGICAL AND SOCIAL-ECONOMIC HAZARDS ON THE NAVAJO NATION
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PublisherThe University of Arizona.
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AbstractFlooding events have caused many considerable losses to individuals and businesses all over the United States. Floods are the most frequent severe weather threat and the costliest natural disaster in the nation. Ninety percent of all natural disasters in the country involve flooding. In order to effectively mitigate and prevent flood disasters, flood risk and flood management needs to be implemented in areas that are vulnerable and susceptible to flooding. The area of study will be the Navajo Nation region in the state of Arizona. Analysis and evaluation of flooding events near Marble Canyon and the city of Winslow between the years 2010 and 2020 are the main objectives of this project. Flood susceptibility analysis in ArcGIS Pro can determine the risk of flooding near these areas and how it affects their geology and economy. Major flooding of these areas has caused severe damage to roads, homes, crops, businesses, schools, hospitals, and emergency services. The following factors are included in the flood analysis, slope, hydrology, rainfall, and land cover. Using the reclassify and weighted overlay tools in ArcGIS Pro for each of these factors, a flood risk map of each area shows the severity of flood risk. Each flood risk area has an allocated value from “very low,” “low,” “medium,” “high”, and “very high” flood risk. This shows what areas are more vulnerable than others in both regions of the Navajo Nation. These results can be used to highlight areas that require planning and action to avoid or mitigate damages and loss of lives.
Degree ProgramGeographic Information Systems Technology
Degree GrantorUniversity of Arizona
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Application of Remote Sensing in Floodway DelineationClark, Robin B. (Arizona-Nevada Academy of Science, 1974-04-20)Population pressures on the land resources of Arizona have led to the sale and development of areas subject to flooding and because of the inadequacy of land use controls, the area is open to various land speculation schemes and unplanned subdivision growth. A floodplain delineation project was conducted for the planning department of Cochise County, Arizona, in which imagery acquired by earth resources technology satellite (ERT-1) and by high-altitude aircraft was employed. Parameters of the analysis included soils and geomorphology, vegetation, hydrologic calculations, and historical data. Floodplain soils lack developed b horizons, as compared to older, more mature soils not subject to flooding. General soil maps can only be used as guidelines, but a detailed soil survey can add significantly to the accuracy of image interpretations. Erosion-affected soil tones in areas adjacent to active channels proved beneficial in that the heightened contrast served to enhance resolution of vegetation-type boundaries. Hydrologic calculations were done based on valley cross-sections surveyed at two-to-three mile intervals. The historic data input into the system of floodplain delineation is dependent on the location of high-water marks and on obtaining a record of the amount of rainfall which resulted in the high-water mark.
Some Legal Problems of Urban RunoffHolub, Hugh; College of Law, University of Arizona, Tucson (Arizona-Nevada Academy of Science, 1972-05-06)Pressure is being brought to bear on national resources of air, earth, and water in the growing cities in the arid southwest. Legal questions involved in capturing urban runoff and putting it to a beneficial use are examined. Urbanization of a watershed results in a 3 to 5 fold increase in runoff amounts. Legal aspects include tort liability from floods, water rights to the increased flows, land use restrictions along banks and flood plains, condemnation of land for park development and flowage easements, financing problems, zoning applications, and coordination of governmental bodies responsible for parks, storm drainage and related services. Urban runoff is the most obvious legal problem in the tort liability area. It appears feasible to divert small quantities of water from urban wastes for recreational uses which provide flood control benefits. It appears that municipalities could appropriate increased flows caused by urbanization. The ultimate legal questions remain to be resolved by legislation, litigation or extension of the appropriative system.
Improvements to Flood Detection and Monitoring Through Satellite Autonomy, Sensor Webs and Hydrological ModelingIp, Filipe; Gupta, Hoshin; Baker, Victor R.; Marsh, Stuart (The University of Arizona., 2006)This dissertation is put together from a set of three journal papers. The first paper describes how satellite imagery and spacecraft autonomy are used to advance the field of near real-time detection, monitoring, and rapid response to flooding. The second paper describes the ground instrumentation of an artificial water recharge basin field site close to Tucson with a network of inter-connected sensors to study the transient process of repeated flooding in real-time, and the third paper describes an effort to link together multiple ground-based and space-based remote sensing assets to an integrated and coordinated monitoring system for floods. Collectively, the three papers describe new breakthroughs in the field of flood detection and monitoring through the use of satellite onboard automation and Sensorweb networks.