Assessment of the actual water basin capacity with the use of GIS (original) (raw)
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determinAtion of bAsin chArActeristics by using geogrAphicAl informAtion systems (gis)
Journal of environmental protection and ecology
Climate change, population growth, and economic development will significantly affect the availability of water resources for agriculture in different regions. It is estimated that this effect will occur as a decrease in rainfall and an increase in drought in the Thrace region. To produce the sufficient amount of food which will be demanded by the increasing population, inadequate water resources must be used more efficiently. In this study, the Watershed Modelling System (WMS) version 7.1 was used for the delineation of boundaries of Topcu sub-basin of the Ergene river basin located in the Thrace region of Turkey. Digital elevation model (DEM) which has been obtained from Aster satellite for the year 2007 was used for extracting drainage networks and watershed delineation. Typical properties like drainage areas, characteristic length and slope of sub-drainage areas have also been determined. The largest sub-basin area is 121.8 km 2 while the smallest sub-basin area is 4.7 km 2. These parameters have been stored to use for later hydrological analyses.
Afyon Kocatepe Üniversitesi Sosyal Bilimler Dergisi 21(035502):620-631, 2021
Among the groundwater resources in Turkey, there are quite important basins with their agricultural land use characteristics and ecological characteristics. One of them, Konya Closed Basin (KCB), along with its sub-basins, has Turkey's grain reserves. However, over the last years, over-exploitation of groundwater resources, water-level reductions have become a threat to the ecological structure of the sinkholes and the basin. In order for this process to be analysed with all its causes and measures can be taken, it is necessary to monitor and record the changes that are experienced. In this context, Geographical Information System (GIS) is important as a system that can demonstrate the change in the basin. In this study, the change of groundwater level was investigated with the help of GIS, in order to protect the ecological balance in the KCB Altınekin Basin, where significant decreases in groundwater level have been experienced in recent years. The change in the data of 2015 and 2016, which was obtained from 10 water wells where the groundwater level in this basin was identified, was analysed with the aid of GIS. It has been found that the groundwater level in the basin changes with agricultural land use characteristics, daily use, and climatic changes.
GIS on drainage system quantitative analysis
3ο Ελληνικό Περιβαλλοντικό Συνέδριο της Ελληνικής Φυσικής Εταιρείας, 1998
In a drainage system study, one of the metrology methods is the use of the three Horton Laws, plus the calculation of frequency and density. Although these calculations need very simple mathematical operations, they present a lot of problems that force scientists to achieve a result of reduced accuracy.
Earth Systems and Environment, 2019
Nowadays there are a lot of geospatial datasets available in the form of different types of Digital Elevation Models (DEMs) which were launched with different resolutions. These datasets are used for studying the physiographical features of the hydrographic basins through the tracing and extracting the elevation points, watershed boundaries, streamlines, flow directions and morphometric parameters assessment. Many researchers have used these datasets to study and evaluate the hydrologic behavior of the basins which is considered as the reflection of physiographic features of the hydrographic basins. In the Middle East especially in Saudi Arabia, the trend of using DEMs increased for hydrographic basin analysis and assessment of hydrologic behavior. So, there is an important question about the accuracy and sensitivity of these datasets which are acquired from different DEMs. This study deals with four types of DEMs, first is derivative from Advanced Spaceborne Thermal Emission and Reflection Radiometer (ASTER 30 m resolution), second is Shuttle Radar Topographic Mission (SRTM 90 m resolution), third is SRTM 30 m resolution and the fourth is the Advanced Land Observing STLT (ALOS 30 resolution). More than 35 morphometric parameters including drainage network, basin geometry, basin texture and basin relief characteristics were measured and calculated using these four types of DEMs and calibrated with topographic maps of 1:250 K and 1:50 K scale and also google earth maps. Results show that the SRTM 30 m is characterized by high accuracy and has a very good matching with google earth maps and topographic map of scale1:50,000. This research is dealing with the comparison of the morphometric parameters of the hydrographic basin based on the type of DEM. It is clear to conclude that the SRTM 30 resolution is the best type for hydrology and water resources study.
Quantitative Analysis of a River Basin - A GIS-based Approach
2021
The river basin plays a fundamental role in planning the management of natural resources. The hydrological behavior of the basin depends on the geomorphological parameters of the hydrographic basin. In the present study, a morphometric analysis was performed to determine the linear, areal and relief parameters of the Panzara River, the main tributary of the Tapi River, using the Geographic Information System tool. The river basin is of seventh order, showing a dendritic pattern of drainage that indicates the homogeneity in the texture of the basin. The drainage density in the area is 2.56 and the mean bifurcation ratio 5.065 indicates the less impact of structural deformations on the basin. The stream frequency of the basin is 3.20 showing low relief and high permeability. The present study reveals that the applications of GIS techniques are reliable, take less time and are competent to manage large databases for management of river basins.
2018
Water is one of the most underlying resources in our life, for human life and for a sustainable development. Integrated managing of water resources asks for a wide base of date concerned with water. The neccesary information to evaluate the water resources is comprised of all variables that close the balance of water that is collected in the reservoir. The managing of a river basin (WFD 2000/60 EC) is admitted as a mechanism that responds to the requirements of the community as far as the river pond is concerned. In many cases the existing crises of water resources comprises in itself a crises which is concerned with managing process of water resources as well as lack of proper information which is related to exploitation of water. The management of water resources in real time as well as the implementation of GIS technology the most demanding challenges that the respective authorities which are obliged to cope with. This paper aims to reveal and demonstrate how GIS facilitates the process of planning and managing the water resources in the river basin of Blinaja. GIS serves as a tool which provides opportunities for carrying out the systemization, analysis and managing of collected data which are related to planning the water resources in the respective basin. The results of this paper witnessed how the implementation of GIS technology has succeed to provide rapid assessments, visualizing oppotunities aiming to assist the planning, exploitation and well-administering until the decision-making process in the river basin of Blinaja.
Assesment of bathymetric maps via GIS for water in reservoir
Boletim de Ciências Geodésicas, 2014
In order to adopt measures for storing more water in reservoirs, lakes and ponds; to prevent water pollution, protect water sources and extend the service life of these facilities, it is important for manager (Municipalities, Directorates of the State Hydraulic Works (DSHW), Irrigation Unions etc.) to know the current topographic conditions and any changes in the storage capacities of these facilities. This study aimed to identify the updated topographic and bathymetric data required for the efficient management and usage of Altınapa reservoir, changes in surface area and volume of the facility, and to form a Reservoir Information System (RIS). Two digital elevation models, from 2009 and 1984, were used to determine changes in the storage capacity of the reservoir. The calculations indicated that, within this 25-year period, the storage capacity of the reservoir decreased by 12.7% due to sedimentation. A Dam Information System (RIS) was developed from a wide range of data sources, i...
MORPHOMETRIC ANALYSIS OF DRAINAGE BASIN USING RS AND GIS TECHNIQUES
IJLTEM.COM, 2019
Geographical information system (GIS) has emerged as an efficient tool in delineation of drainage pattern and ground water potential and its planning. GIS and image processing techniques can be employed for the identification of morphological features and analyzing properties of basin. The morphometric parameters of basin can address linear, areal and relief aspects. The review related to 'Morphometric analysis of drainage basin using remote sensing and GIS techniques' is discussed in the present paper.
APPLICATION OF GIS IN THE DESIGN OF HYDROMETEOROLOGICAL DESIGN IN OGUN-OSHUN RIVER BASIN
Geographical information system (GIS) has proved to be an efficient tool in the design of hydrometeorological networks for water resources management and planning. The design of hydrometeorological network in Ogun-Oshun river basin was carried out using Geographic Information System (GIS). The hydrometeorological parameters of interest are Precipitation, Evaporation, Evapotranspiration, Streamflow and temperature. The primary data and field information were obtained from the working files and existing stations of Ogun-Oshun River Basin Development Authority. The result shows gross inadequacy of hydrometeorological stations in the basin area following recommended minimum network area per km.sq specified by WMO for each physiographic unit suitable for successful management, research and planning. The reliability of hydrometeorological characteristics depends not only on the accuracy of observations, but also on the mathematical background for interpretation of the results. The need to optimize networks, means and methods of observations as well as the procedures and techniques of data processing is also discussed.