Morphometric analysis of a drainage basin using geographical information system in Gilgel Abay watershed, Lake Tana Basin, upper Blue Nile Basin, Ethiopia

Patel

et al. 2021

IJECC

The Nagavali river basin (NRB), along east coast of India investigated for its land use and land cover changes (LULCC) in the golden spike period of Anthropocene Epoch. Attempts made to assess the vicissitudes, causes, and consequences of natural resources, and soil/water resources of the NRB in last three decades as significant changes in hydro-climatic variables occurred. The interstate basin is well developed in lower reaches (north Andhra Pradesh) whereas upper stretches, South Odisha is less organized. GIS and remote sensing are efficient tools for an ideal study of LULCC of the area. Present work evaluates the dynamics of LULCC of NRB. LANDSAT-5, LANDSAT-8, of 1990, 2000, 2010 and 2020, respectively, were digitally classified for land use land cover mapping. The changing aspects of LULCC critically analyzed for three span, 1990–2000, 2000–2010 and 2010–2020. Through Normalized Difference Vegetation Index (NDVI) of the NRB examined carefully to assess the recent LULCC pattern. Major changes are sue to exchanges of areas are in between forest and built-up land followed by water body. The transformations are from forest to human habitation; especially built-up area that constitutes major percentage of the total landscape. The study shows that emphasis is necessary on more water consolidation projects in the upper Nagavali Basin considering the long-term LULC trend analysis.

Section: Geospatial Techniquementioning

confidence: 99%

Geomorphologic Change in Nagavali River Basin: Geospatial Approach

Patel

et al. 2021

IJECC

“…The results revealed that the basin is elongated and that the SRTM DEMs have a more significant root mean square error than the CARTOSAT DEMs. The morphometric parameters of Lake Tana and upper Blue Nile basins (Ethiopia) were also assessed using the RS approach and GIS [25]. The results revealed that the study basin, especially Gilgel Abay, is slightly vulnerable to soil erosion and flooding, with a significant contribution of surface runoff on aquifer recharge and groundwater.…”

Section: Introductionmentioning

confidence: 99%

Determining the Hydrological Behaviour of Catchment Based on Quantitative Morphometric Analysis in the Hard Rock Area of Nand Samand Catchment, Rajasthan, India

et al. 2022

India’s water resources are under tremendous pressure due to elevated demand for various purposes. The over-exploitation of these valuable resources has resulted in an imbalance in the watershed ecology. The application of spatial analysis tools in studying the morphological behaviour of watersheds has increased in recent decades worldwide due to the accessibility of the geospatial database. A morphometric analysis of a river basin is vital to determine the hydrological behaviour to develop effective management. Under the current study, morphological behaviour of Nand Samand catchment in the hard rock region was evaluated employing remote sensing (RS) and geographical information system (GIS) tools. The Nand Samand catchment (Rajasthan State, India) has an area of 865.18 km2 with the highest and lowest elevations of 1318 m and 570 m above mean sea level, respectively. This study utilises a 30 m high-spatial-resolution ASTER imagery digital elevation model for delineating the catchment. The drainage network is assessed using a GIS method, and morphometric parameters like linear, areal, and relief aspects were calculated. Results were obtained for parameters viz., basin length of 82.66 km, constant channel maintenance equal to 0.68 km, stream frequency of 2.11 km−2, drainage density of 1.48 km−1, and length overflow of 0.34 km. Form factor of 0.13, and the circulatory ratio of 0.28 showed that an elongated shape characterises the study area. The results would help understand the relationship between hydrological variables and geomorphological parameters for better decision-making. The techniques used could effectively help to perform better drainage basin and channel network morphometric analyses. The found morphometric characteristics will be helpful in understanding the Nand Samand catchment and similar areas in India in order to better guide the decision-makers in providing adequate policy to the development of the region.

IOP Conf. Ser.: Earth Environ. Sci.

“…An attempt has been undertaken to research the morphometric aspects of the Didessa watershed, which is part of the Blue Nile River basin in Ethiopia's southwestern region [25]. On the Tikur Wuha river watershed, the hydrological aspects of morphometric parameters were evaluated [26,27]. Quantitative morphometry analysis on Ribb and Gumara watersheds has been undertaken to prioritize the watershed for soil and water conservation [28].…”

Section: Introductionmentioning

confidence: 99%

Application of Remote Sensing, GIS, and Drainage Morphometric Analysis in Groundwater potential Assessment for sustainable development in Iyenda River Catchment, Konso Zone, Rift Valley, Southern Ethiopia

Jothimani

Abebe

Berhanu

2022

The present study employed remote sensing data, GIS technologies, and drainage morphometric analysis to assess groundwater potential for sustainable development in the Iyenada River Catchment, Rift Valley, Southern Ethiopia. A 30 m spatial resolution Shuttle Radar Topographic Mapper (SRTM) digital elevation model and toposheets were used to demarcate the present study area’s watershed boundary and extract drainage network in Arc GIS software environment. The current study area was divided into eight watersheds, namely WS-1, WS-2, WS-3, WS-4, WS-5, WS-6, WS-7, and WS-8, and the total areal extend is 497.70 Sqkm. The standard formula was used to determine the necessary linear, relief, and spatial morphometric parameters. According to the present investigation results, the current study region includes undulating topography with slopes ranging from 0° to 52°. The groundwater occurrence is inversely proportional to the following morphometric parameter values: stream frequency, drainage texture, drainage density, bifurcation ratio, and form factor; the lower the values, the more significant groundwater occurrence. The groundwater occurrence is directly proportional to the morphometric parameters: compactness coefficient, elongation ratio, circularity ratio, and length of overland flow. The present study areas’ watersheds were prioritized using compound parameter analysis, which combined the mentioned-above morphometric parameters for each watershed. Compound factor values ranging between 3.78 to 5.11 and same was classified into three categories, and priorities were assigned 3.780 - 4.11 (high), 4.12 - 4.78 (medium), and 4.79 - 5.11 (low). The watersheds (WS-2 and WS-4) need immediate attention to minimize the surface runoff and enhance groundwater recharge. The results show that WS-7 having high and WS-1, WS-3, WS-5, WS-6, and WS-8 have medium groundwater potential. Watersheds with poor groundwater potential demand additional thorough research and remedial procedures, including implementing appropriate recharge systems. The current study demonstrates the effective use of remote sensing, GIS, and drainage morphometry in assessing groundwater potential.