File Name: topography and hydrology analysis and modelling of region by using gis .zip
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Papua New Guinea PNG is saddled with frequent natural disasters like earthquake, volcanic eruption, landslide, drought, flood etc. In respect to social, economic and environmental perspective, flood is one of the most devastating disasters in PNG. This research was conducted to investigate the usefulness of remote sensing, geographic information system and the frequency ratio FR for flood susceptibility mapping. FR model was used to handle different independent variables via weighted-based bivariate probability values to generate a plausible flood susceptibility map. Finally, the database was developed for areas vulnerable to flood. The result demonstrated a span of FR values ranging from 2.
The hydrological cycle is also known as the water cycle, describing the phenomenon of the water recycling system on the earth, which is in the oceans, atmosphere, land surface, biosphere, soil and groundwater systems. There are several stages of the hydrological cycle that occur on this earth, including evaporation and transpiration, precipitation, run-off and watershed processes Narasimhan , Marshall , Inglezakis et al. Water contained in the sea and land surface can evaporate into the air and move up into the atmosphere directly and through vegetation as a process of evaporation and transpiration, that occurs condensation, clouds, and rain as a process of precipitation. Rainfall that falls to the ground surface becomes run-off, and also some water will be infiltrated into the ground and become ground water. A watershed is an area that is bounded by surface topography and also drainage or river patterns. Rainfall that accumulates into the watershed will flow through drainage or river to an outlet on the surface of the earth Marshall , Muharomah Furthermore, the characteristics and conditions of a watershed in an area can be explained by a geomorphological approach.
A geographic information system GIS is a conceptualized framework that provides the ability to capture and analyze spatial and geographic data. GIS applications or GIS apps are computer-based tools that allow the user to create interactive queries user-created searches , store and edit spatial and non-spatial data, analyze spatial information output, and visually share the results of these operations by presenting them as maps. Geographic information science or, GIScience —the scientific study of geographic concepts, applications, and systems—is commonly initialized as GIS, as well.
Geographical Information Systems in Hydrology pp Cite as. In this chapter the rainfall-runoff phenomenon is considered emphasizing the role assumed by the runoff production. Through the use of GIS, capable of managing and storing a great amount of data, different mechanisms of runoff production are analyzed. In particular a modified and spatially distributed version of TOPMODEL, which is capable of modeling both infiltration excess and saturation excess runoff and incorporating the spatial variability of soil, topography and rainfall, had been applied to simulate the hydrological behavior of an experimental basin Turbolo Creek — Southern Italy Finally, through geostatistical analysis, the spatial distribution of soil parameters is considered to obtain useful information on the characteristic dimension of the elementary drainage area.
Metrics details. This research examines the susceptibility of logged and regenerated forest region to erosion through the application of the analytical hierarchy process AHP and geographical information systems GIS. In order to estimate terrain erosion susceptibility, ten geo-environmental variables were taken into account as possible factors relevant to terrain erosion. Pairwise comparison matrixes were generated to derive the weightages and ratings of each variable and their classes. These were integrated to generate the terrain erosion susceptibility index TESI map.
In several parts of the world, groundwater potential information gap limits the development and management of the resource. SWAT was used to model the spatiotemporal variation of groundwater recharge. The calibration and validation results show the applicability of the model in the study area.
- Абсолютно. Скажи папе, что все в порядке. Но нутром он чувствовал, что это далеко не. Интуиция подсказывала ему, что в глубинах дешифровального чудовища происходит что-то необычное. ГЛАВА 10 - Энсей Танкадо мертв? - Сьюзан почувствовала подступившую к горлу тошноту.
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