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India’s annual weather cycle consists mainly of wet and dry periods with monsoonal rains being one of the significant wet periods that shows strong spatiotemporal variability. This study includes the climatological characteristics, fluctuation features, and periodic cycles of annual, seasonal, and monthly rainfall of seven river basins across the eastern Gangetic Plain (EGP) using the longest possible instrumental area-averaged monthly rainfall series (1829–2012). Understanding the relationships between these parameters and global tropospheric temperature changes and El Niño and La Niña climatic signals is also attempted.Climatologically, mean annual rainfall in the EGP varies from 1070.5?mm in the Tons River basin to 1508.6?mm in the Subarnarekha River basin. The highest rainfall in the EGP occurs during monsoon (1188?mm). The annual rainfall in all river basins and monsoon rainfall in four river basins is normally distributed. Annual and monsoonal rainfall in the Brahmani and Son River basins show a significant decreasing long-term trend. Over the last 20 years, annual rainfall in all river basins and monsoonal rainfall in five river basins show a decreasing trend. The power spectra for all rainfall series are characterized by consistent significant wavelength peaks at 3–5 years, 10–20 years, 40 years, and more than 80 years. Short-term fluctuations with a period less than 10 years is the major contributor to total variance in annual and/or monsoon rainfall (77.6%), followed by decadal variations with a period of 10–30 years (13.1%) and a long-term trend with a period greater than 30 years (9.3%).Temperature and thickness gradients from the Tibet–Himalaya–Karakoram–Hindu Kush highlands to eight strong highs show a significant correlation with rainfall during the onset and withdrawal phases of summer monsoon in the EGP. 相似文献
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M. S. Yadav P. P. S. Yadav M. Yaduvanshi D. Verma A. N. Singh 《Journal of the Indian Society of Remote Sensing》2010,38(2):269-278
Sodicland reclamation in the Indo-Gangetic plains is being done on a large scale in the states of Uttar Pradesh, Punjab and
Haryana in India. However, in certain areas, the reclamation has been reported to be unsustainable and the soils are reverting
back to sodicity condition. A study was conducted in one of the reclamation sites of Etawah district for sustainability assessment
of sodic land reclamation using remote sensing, Geographic Information system (GIS) and ancillary ground information. Multitemporal
satellite data were used for delineation of reclaimed sodiclands and reverted sodic land. Field survey was conducted to find
out the various causative factors. Groundwater level information and detailed field survey data were analysed in GIS environment.
Results showed that in the reclamation site covering 3,905 ha. in 57 villages of the district, about 27 per cent of reclaimed
lands were reverted to sodicity. High water table condition, improper drainage, nearness to canal (within 500 m), and hard
pan in the sub-soil were found to be the reasons for unsustainability of reclamation. 相似文献
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Yaduvanshi Aradhana Kulkarni Ashwini Bendapudi Ramkumar Haldar Kaushik 《Natural Hazards》2020,103(1):685-711
Natural Hazards - The present study examines the spatial and temporal changes in extreme rainfall events (EREs) across the Godavari river basin to develop adaptation strategies for vulnerable... 相似文献
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Anil Kumar Misra Anju Saxena Manish Yaduvanshi Ajai Mishra Yogendra Bhadauriya Alok Thakur 《Environmental Geology》2007,51(8):1361-1376
India is a vast country and is highly diversified in terms of natural resources and socio-economic setup. Moreover, its water
resources are unevenly distributed in space and time. With increasing population and increasing aspiration for improved standard
of living, there is an acute pressure on the demand and availability of water. Though the idea of interlinking of rivers is
not a new concept in India, it had rather persisted long back as much as in other countries of ancient civilization. National
Water Development Agency (NWDA) has given the real shape to the proposal of the interlinking of rivers of the country. In
India the river-linking project in a sensible and scientific manner will not only allow the prevention of the colossal wastage
of a vitally important natural resource, mitigate the flood and inundation by detaining flowing surface water of rainy seasons,
but also ensure availability of water to drier areas; combating both flood and drought simultaneously. Moreover, this project
will generate 34,000 MW of hydropower and irrigation of an additional 35 million hectares (135,135 square miles) of land.
Though linking of rivers may initially appear to be a costly proposition in ecological, geological, hydrological and economical
terms, in the long run the net benefits coming from it will far outweigh these costs or losses. However, in the absence of
any definite international legal framework, Bangladesh has raised objections against the project. This paper aims at looking
at this long-term plan, the project proposal, its involvement and impact not only on the states of India, India as a whole,
but also on its neighbouring nations which are linked with India through the waterways, and share the common climatic conditions
and economic status. 相似文献
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