The basin of Ramganga River, a major tributary of Ganga, has seen rapid industrialization, urbanization, and agricultural growth in modern times, especially during and after the 1970s, with consequent changes in Land Use and Land Cover (LULC) of the basin. Object-based classification of seldom-used CORONA images (for 1970) for historical LULC scenario and LISS IV (Resourcesat-2) images (for 2013-14) for the present scenario of the basin was performed with high overall accuracies of 93% and 87% and Kappa coefficients of 0.89 and 0.82 respectively. Object-based classification using the eCognition software tool combined with manual classification of the images revealed significant decrease in total forest cover (~ 485 km) and riverbed (~ 498 km) LULC classes along with correspondingly increased agriculture (~ 898 km) and built-up (~ 313 km) classes in the basin. Further, though Ramganga reservoir (spread over ~ 70 km), operated since in 1974, has increased the water area by ~ 1295% in Afzalgarh sub-basin of the Ramganga Basin, the overall area of water class decreased by 1.64% in the basin, probably due to loss of ponds in agricultural lands. An upward shift of about 42 km in the confluence point of Ramganga and Gangan Rivers was also observed, which may be attributed to the course shift of Ramganga in a south-west direction.
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http://dx.doi.org/10.1007/s10661-019-7356-9 | DOI Listing |
Environ Monit Assess
September 2023
Department of Earth Sciences, Indian Institute of Technology Kanpur, Kanpur, India.
Environ Monit Assess
November 2022
Department of Civil Engineering, Indian Institute of Technology (BHU), Varanasi, 221005, India.
In many regions across the world, including river basins, population growth and land development have enhanced the demand for land and other natural resources. The anthropogenic activities can be detrimental to the vital ecosystems that sustain the river basin region. This work assessed the impact of human modification on land surface temperature (LST) for the Ramganga basin in India.
View Article and Find Full Text PDFEnviron Monit Assess
July 2020
UK Centre for Ecology & Hydrology, Maclean Building, Crowmarsh Gifford, Wallingford, Oxfordshire, OX10 8BB, UK.
The Ganga River is facing mounting environmental pressures due to rapidly increasing human population, urbanisation, industrialisation and agricultural intensification, resulting in worsening water quality, ecological status and impacts on human health. A combined inorganic chemical, algal and bacterial survey (using flow cytometry and 16S rRNA gene sequencing) along the upper and middle Ganga (from the Himalayan foothills to Kanpur) was conducted under pre-monsoon conditions. The upper Ganga had total phosphorus (TP) and total dissolved nitrogen concentrations of less than 100 μg l and 1.
View Article and Find Full Text PDFEnviron Pollut
March 2020
Ganga River Ecology Research Laboratory, Environmental Science Division, Centre of Advanced Study in Botany, Institute of Science, Banaras Hindu University, Varanasi, 221005, India. Electronic address:
We investigated the effect of hypoxic-anoxic range of dissolved oxygen (DO) on metal release/bioavailability at sediment-water interface (SWI) in the Ganga River. Here, we consider eight sites in the main river stem along 518 km; sixty sites downstream two point sources and two tributary confluences covering 630 km; and an incubation experiment to verify these results. We found higher concentrations of metals and bioavailable fractions at SWI at two locations of main stem and up to 700 m, 1000 m, 400 m and 500 m downstream Assi drain, Wazidpur drain, Ramganga confluence and Varuna confluence respectively where DO at SWI (DO) was <2.
View Article and Find Full Text PDFEnviron Monit Assess
November 2019
Department of Chemistry, IIT (BHU), Varanasi, 221005, India.
Remote sensing-based flood inundation mapping and monitoring is very crucial input before, during, and after floods. Ganga-Ramganga doab is one of the prolonged flood-affected area in middle Ganga plain due to seasonal monsoon which leads to rise in water levels of Ganga and Ramganga rivers. The focus of the present study is to map severe flood condition captured through synthetic aperture radar (SAR) data during August-September 2018, and to explain the impact on Ramganga river morphology.
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