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Jain, Sharad K.
- Assessment of Environmental Flow Requirements for Hydropower Projects in India
Abstract Views :180 |
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Authors
Affiliations
1 National Institute of Hydrology, Roorkee 247 667, IN
1 National Institute of Hydrology, Roorkee 247 667, IN
Source
Current Science, Vol 108, No 10 (2015), Pagination: 1815-1825Abstract
Increasing water withdrawals from many rivers of the world is leading to severe degradation in river ecosystems. Water is allocated for environmental needs so that a river can perform its natural functions. Environmental flows (EF) try to strike a balance between the use of water of a river for economic development, societal needs and delivering ecosystem services. This article describes a framework to assess environmental flows for a hydropower project in India in a situation where limited hydrological and very limited ecosystem data are available. It recommends that in such a situation, an acceptable EF regime can be arrived at by analysing hydrological data, supplemented by whatever ecosystem data are available and creating various scenarios of EFs. Benefits and impacts of different EF scenarios can then form the basis to determine an appropriate EF regime. Application of the framework is demonstrated in a case study in India. Adaptive management, where feedbacks are used to update and improve the decisions is helpful in such situations.Keywords
Environmental Flow, Flow Duration Curve, Hydropower Projects, River Ecosystems.Full Text
- Bengaluru Water Resource Management: Challenges and Remedies
Abstract Views :118 |
PDF Views:23
Authors
Affiliations
1 National Institute of Hydrology, Roorkee 247 667, IN
1 National Institute of Hydrology, Roorkee 247 667, IN
Source
Current Science, Vol 109, No 8 (2015), Pagination: 1501-1502Abstract
No Abstract.Full Text
- Trends in Rainfall and Peak Flows for some River Basins in India
Abstract Views :133 |
PDF Views:18
Authors
Affiliations
1 National Institute of Hydrology, Roorkee 247 667, IN
1 National Institute of Hydrology, Roorkee 247 667, IN
Source
Current Science, Vol 112, No 08 (2017), Pagination: 1712-1726Abstract
The aim of the present study is to examine the trends in magnitude and intensity of precipitation and peak floods of different magnitudes for seven major river basins in India. Data pertaining to daily flows for about 30-odd years and precipitation for 61 years (from 1951 to 2012) were analysed. Linear trends were calculated for the number of rainy days, rainfall intensity and occurrence of flood peaks for all basins. Using the Sen's slope estimator, it was found that annual peak rainfall increases for most of the basins in India. From the Mann-Kendall test and Sen's slope, it was found that the Cauvery and Brahamani and Baitarani basins show a rising trend in the number of rainy days, but the trend was falling for five other basins. When the basins were classified as mountains and plains, it was found that the number of daily rainfall events of different magnitudes was more in the mountains compared to the plains. The rivers which flow from west to east direction have more rainy days compared to those which flow towards the west. It was observed that in general the number of rainy days was falling while the number of intense events was increasing. The number of flood peaks of smaller magnitude in different decades showed slight falling trend. It was also found that there was falling or no trend for severe floods. Anthropogenic activities (construction of storage reservoirs, diversions, urbanization, land-use change, and soil and water conservation measures, etc.) have probably affected the generation of peak floods in the rivers of India. River regulation through storage reservoirs in the past 50 years has resulted in the reduction of peak flows. Hence with the same rainfall, the flood peaks would have increased under virgin conditions.Keywords
Flood Peaks, Rainfall Trends, River Basins.Full Text
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- Water Resource Management in India
Abstract Views :146 |
PDF Views:14
Authors
Affiliations
1 National Institute of Hydrology, Roorkee 247 667, IN
1 National Institute of Hydrology, Roorkee 247 667, IN
Source
Current Science, Vol 113, No 07 (2017), Pagination: 1211-1212Abstract
Water is a key natural resource which is fundamental to life, livelihood, food, energy and water security and sustainable development.Full Text
- Integrated and Sustainable Water Management:Science and Technology
Abstract Views :118 |
PDF Views:11
Authors
Affiliations
1 National Institute of Hydrology, Roorkee 247 667, IN
1 National Institute of Hydrology, Roorkee 247 667, IN
Source
Current Science, Vol 114, No 01 (2018), Pagination: 221-222Abstract
Water is a key factor in sustainable development of a nation. Hence, the status of water resources and their sustainability, particularly in the arid and semi-arid areas of the country, are of prime concern. Rainfall, the source of all water on earth, has a huge spatial and temporal variation in the Indian subcontinent; it is mainly confined to four months during the monsoon season in a year. India has nearly 33% of its geographical area in the semi-arid and arid category. A substantial part of the arid and semi-arid areas is drought-prone.Full Text
- Water Resources Management in India–Challenges and the Way Forward
Abstract Views :133 |
PDF Views:13
Authors
Source
Current Science, Vol 117, No 4 (2019), Pagination: 569-576Abstract
Management of water resources in India has been a challenge whose magnitude has risen manifolds over the past 50 years due to a variety of reasons, notably the rising demands and growing environmental degradation. Broadly, most of the challenges in water management in India can be categorized in the following groups: (a) water availability, variability and increasing withdrawals, (b) environment and quality, (c) project construction, (d) water sharing disputes, (e) water governance and institutions, and (f) challenges induced due to climate and land-use cover changes. Here we discuss each of these challenges in detail. It is suggested that conservation of water and management of variabilities should be a cornerstone of water resources management in India. This note also suggests remedies to address the challenges and covers new initiatives by the Government of India (GoI).Keywords
Artificial Recharge, Biodiversity, Climate Change, Water Governance, Water Resources.Full Text
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- Assessment and Implementation of Environmental Flows
Abstract Views :143 |
PDF Views:15
Authors
Affiliations
1 Civil Engineering Department, IIT Roorkee, Roorkee 247 667, IN
1 Civil Engineering Department, IIT Roorkee, Roorkee 247 667, IN
Source
Current Science, Vol 118, No 11 (2020), Pagination: 1639-1640Abstract
Healthy rivers, floodplains and wetlands support a wide range of valuable services to the society. These systems provide us freshwater, food, wood and fuel. They support primary production, nutrient cycling and soil formations. In addition, natural eco-systems regulate climate, water, extremes such as floods and droughts, and health. They also give cultural, social, spiritual and recreational benefits. However, in recent times, upstream withdrawals, hydro- projects and landuse–landcover (LU–LC) changes have greatly modified the magnitude, timing and duration of river flows. Water resources development has provided water–food–energy security to the society. It has almost eliminated famines and considerably reduced malnutrition. But at the same time, these developments have caused significant harm to the natural aquatic ecosystems. Rivers, wetlands, floodplains and estuaries are the world’s most threatened ecosystems these days.Full Text
- A Perspective on Water Security in India
Abstract Views :150 |
PDF Views:17
Authors
Affiliations
1 Department of Civil Engineering, Indian Institute of Technology, Roorkee 247 667, IN
1 Department of Civil Engineering, Indian Institute of Technology, Roorkee 247 667, IN
Source
Current Science, Vol 120, No 1 (2021), Pagination: 7-8Abstract
No Abstract.Full Text
- Flood Management in India
Abstract Views :150 |
PDF Views:18
Authors
Affiliations
1 Civil Engineering Department, IIT Roorkee, Roorkee 247 667, IN
1 Civil Engineering Department, IIT Roorkee, Roorkee 247 667, IN
Source
Current Science, Vol 120, No 3 (2021), Pagination: 455-456Abstract
No Abstract.Full Text
- Suggestions for a course on environment and social hydrology for hydrologists
Abstract Views :76 |
PDF Views:14
Authors
Affiliations
1 Civil Engineering Department, IIT Roorkee, Roorkee 247 667, IN
2 former Chairman, Central Pollution Control Board, New Delhi 110 032, IN
1 Civil Engineering Department, IIT Roorkee, Roorkee 247 667, IN
2 former Chairman, Central Pollution Control Board, New Delhi 110 032, IN
Source
Current Science, Vol 120, No 9 (2021), Pagination: 1423-1425Abstract
No Abstract.Keywords
No KeywordsFull Text
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- Managed retreat as an adaptation tool for inland and coastal flooding
Abstract Views :128 |
PDF Views:27
Authors
Affiliations
1 Indian Institute of Technology Roorkee, Roorke 247 667, IN
2 Indian Institute of Technology Bombay, Mumbai 400 076, IN
1 Indian Institute of Technology Roorkee, Roorke 247 667, IN
2 Indian Institute of Technology Bombay, Mumbai 400 076, IN
Source
Current Science, Vol 122, No 10 (2022), Pagination: 1115-1116Abstract
No Abstract.Keywords
No keywordsFull Text
- Climate change and adaptation in water sector in India
Abstract Views :51 |
PDF Views:17
Authors
Affiliations
1 Indian Institute of Technology, Roorkee 247 667, India, India
1 Indian Institute of Technology, Roorkee 247 667, India, India
Source
Current Science, Vol 123, No 4 (2022), Pagination: 515-516Abstract
No Abstract.Full Text