Assessment of the actual water basin capacity with the use of GIS (original) (raw)
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.
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.
Gis Model for Assessing Water and Sediment Discharge Based on the Methodology of Gavrilović
Erosion has been an ongoing problem for centuries. It has followed all the great civilizations. Not so long time ago man realized the great risks that follow the erosion. There have been several methods developed for assessing water and sediment discharge during the years with yield of good and bad results. For this purpose in the region of Grdelička gorge it has been developed the method of Gavrilović which yielded good results for climatically and spatially similar regions. Also this method was largely accepted in the Republic of Macedonia. With the development of new technologies it is of most importance to implement them in the existing methodologies. So the main goal of this paper is to implement GIS (Geographic Information Systems) in the data extraction and analysis. There have been used several standardized datasets for development of the GIS model (CORINE land cover, Erosion map of R.Macedonia, geological map, DEM, climatic data). The main objective is to implement datasets with already established production methodologies and quality into the process of sediment and water discharge GIS based assessment.
The Importance of Monitoring at Irrigation Areas and GIS Applications: Water Table in Particular
International Journal Of Engineering & Applied Sciences, 2016
Monitoring studies are inevitable in terms of ensuring the sustainability of irrigation, creating of awareness related to environmental impact, interfering and taking of measures if necessary besides efficient using water in irrigation applying. Furthermore, monitoring and evaluation studies are very important from the point of providing a basis for scientific researches on scenarios of climate change, drought, sea level rise in coastal areas by creating numerical analysis models of irrigation operation works. The one of the most important activities of irrigation operation phase is monitoring water table. The objective of this study is to assess the change of water table depth and groundwater salinity for the years 2003, 2008 and 2013. In this study, the data obtained from water table monitoring works in an irrigation project operated is evaluated by using Geographic Information Systems which provide efficient and rapid assessment and recommendations are presented.
Comparison of Actual and Presumed Water Capacity of Fish Pond in Lukacovce
Ecology Safety, 2014
This paper deals with the possibility of the reservoir bottom mapping for the calculation of the water depth and water volume in GIS environment with the use of the creation of 3D models of the reservoir bottom in raster and vector formats. Data collection was done in July of 2013 as the non-contact surveying with the GNSS receiver and echosounder. Surveying was executed as the RTK GNSS surveying with continuous depth measurement with echosounder during the sail with raft boat propelled with electric engine. Processing of collected data and model creation was done in ArcGIS 9.2 software. For the raster models creation we used "Spline with tension" and "Topo to raster" interpolation methods, for the vector model creation we used the TIN modelling tools with application of the Delaunay triangulation rules, these models were used for the calculation of the water volume.
Incorporation of GIS Based Program into Hydraulic Model for Water Level Modeling on River Basin
Journal of Water Resource and Protection, 2012
Water resources management usually requires that hydraulic, ecological, and hydrological models be linked. The Hydrologic Engineering Center River Analysis System (HEC-RAS) hydraulic model and the Hydrologic Engineering Center Geospatial River Analysis System (HEC-GEORAS), imitates flow and water profiles in the Neka river basin's downstream flood plain. Hydrograph phases studied during the flood seasons of 1986-1999 and from 2002-2004 were used to calibrate and verify the hydraulic model respectively. Simulations of peak flood stages and hydrographs' evaluations are congruent with studies and observations, with the former showing mean square errors between 4.8 -10 cm. HECRAS calculations and forecast flood water levels. Nash-Sutcliffe effectiveness (CR3) is more than 0.92 along with elevated levels of water which were created with some effectiveness (CR5) of 0.94 for the validation period. The coupled two models show good performance in the water level modeling.
Estimation of Hydraulic Modeling Parameters of Poorly Gauged Basins Using Remote Sensing and GIS
WSEAS International …, 2010
According to the increasing population, pollution of the natural reserves, global climate changing effects, distractions due to disasters make it indispensable to explore and research the Earth faster and cheaper. In comparison to conventional methods, integration of Remote Sensing (RS) and Geographical Information Systems (GIS) offer faster and economical solutions. Recently, for the hydrology and water resource studies and researches, RS and GIS are being used. Eastern Black Sea region where the study area is located in is a mountainous area. This type of places is hard or impossible to reach to acquire data by terrestrial measurement. However, by using integration of RS and GIS even those kinds of basins can be modeled. In small and poorly gauged basins by using different kinds of geostatistical methods, isohyets can be generated. By Digital Elevation Model (DEM), topographic features of the area can be obtained. Besides, by applying image classification to multispectral satellite data, current land use can be determined. Integrating all these data, basin area can be modeled assisted by GIS. In this study, for the classification of the study area IRS P6 multispectral satellite data with 5.8 m spatial resolution are used and to derive the Digital Elevation Model IRS P5 stereo satellite data with 2.5 m spatial resolution is used. The basin characteristics are mathematically modeled. Using DEM, which is generated from satellite data, isohyets map which is created by using one of the geostatistical methods Kriging, and basin characteristics, mean annual flows are estimated by the help of multiple regression analysis.