Climate and Weather

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December 12, 2022 Study looks at behavioral biases in crop insurance adoption
Adoption rate of crop insurance low in India despite government efforts (Image: PxHere, CC0 Public Domain)
September 13, 2022 Heavy rains and floods have battered Bengaluru yet again. Uncontrolled and unregulated development and concretisation of the city that pays no heed to the ecology and hydrology of the region needs to stop!
Urban flooding in Bangalore (Image Source: Thejas via Wikimedia Commons)
August 11, 2022 This could lead to water quality crisis reinforcing the need for basin-specific management strategies
Around the world, more than a fifth of nitrogen released by human activity ends up in aquatic ecosystems (Image: Wikimedia Commons)
May 14, 2022 Climate change is real. What are its implications for India? This book presents a first of its kind national forecast on the impact of global warming on climate in India.
Climate change is real. What does it mean for India? (Image Source: Robert Hensley/Wikimedia Commons)
March 29, 2022 The intensity and duration of heat waves is predicted to increase in India and human induced anthropogenic changes are to blame.
A man sits under the scorching heat of the sun in front of Amer fort in Jaipur (Picture courtesy: Prabhu B Doss, Flickr Commons: CC-By-NC-ND-2.0)
Statistical analysis of rainfall in Sagar division - A research report by the National Institute of Hydrology
The study seeks to understand the problem of rainfall, particularly for identification of any trend or persistence in the rainfall series in the five districts of Sagar division of Madhya Pradesh. Posted on 22 Jun, 2010 08:05 AM

The study seeks to understand the problem of rainfall, particularly for identification of any trend or persistence in the rainfall series in the five districts of Sagar division of Madhya Pradesh. A statistical analysis of the rainfall pattern is conducted using World Meteorological Organization (WMO) recommended statistical techniques for climatological analysis. Besides studying the statistical parameters and cross correlation, other techniques like linear regression and polynomial regression have been applied to identify the presence of any trend. 

Variation of soil moisture characteristics in a part of the Hindon river catchment - A research report by the National Institute of Hydrology
The study attempts to do a field and laboratory determination of soil moisture characteristics in a part of the Hindon river catchment. Posted on 22 Jun, 2010 08:03 AM

The study attempts to do a field and laboratory determination of soil moisture characteristics such as particle size distribution, hydraulic conductivity and soil moisture retention curve in a part of the Hindon river catchment and studies the variation of these along the river in its upstream reach.

Development of geomorphological instantaneous unit hydrograph for Myntdu Leska basin - A research report by the National Institute of Hydrology
The study attempts to develop a computerized model for GIUH for estimation of flood hydrographs resulting from intermittent storms of varying intensity. Posted on 21 Jun, 2010 05:25 PM

The study attempts to develop a computerized model for Geomorphological Instantaneous Unit Hydrograph (GIUH) for estimation of flood hydrographs resulting from intermittent storms of varying intensity. The model applied to the rainfall-runoff data of the Myntdu-Leska basin of Meghalaya infers that the channel network and geomorphological features are closely related to the retention and discharge characteristics of the basin.

The theory of GIUH assumes that rainfall that occurs over a basin is assumed to be composed of infinite number of non-interacting drops of uniform size. After spending some time in one state in the channel or overland region, the drop makes transitions to another state to reach the basin outlet. Assuming one parameter, exponential time distribution of one drop chosen at random from the basin defines the IUH of the basin.

Application of Geographical Information Systems for the assessment of soil erosion using Universal Soil Loss Equation – A research report by the National Institute of Hydrology
The study estimates the average soil loss using the Geographic Information Systems (GIS) for the Hire nadi catchment, in Yelbarga taluk, Koppal district of Karnataka, under different conditions. Posted on 21 Jun, 2010 05:12 PM

The study estimates the average soil loss using the Geographic Information Systems (GIS) tool of Integrated Land and Water Information Systems (ILWIS) and the Universal Soil Loss Equation (USLE) methodology for the Hire nadi catchment, in Yelbarga taluk, Koppal district of Karnataka, under different conditions.  

Scientific planning for soil conservation and water management requires knowledge of the relations among factors that cause and prevent soil and water loss.  Controlled studies on field plots and small watersheds have supplied vital information regarding these complex factors and their interrelations.

Remote sensing and GIS applications in zonation of waterlogging in command areas – A research report by the National Institute of Hydrology
The study assesses waterlogging in a canal command area in Rohtak and Jhajjhar districts through waterlogging area zonation using multi-spectral imagery data of pre and post monsoon period. Posted on 21 Jun, 2010 04:48 PM

The study assesses waterlogging in a canal command area in Rohtak and Jhajjhar districts through waterlogging area zonation using multi-spectral and multi-temporal imagery like IRS LISS III data of pre and post monsoon period. Seasonal and permanent waterlogged area and standing water were delineated on the basis of remote sensing data, digital elevation model and groundwater data.

Snow cover estimation in Himalayan basins using remote sensing: A research report by National Institute of Hydrology
The study estimates the snow cover area for four major basins in the Himalayan region from Chenab up to Akhnoor, Ganga up to Devprayag, Satluj up to Bhakra and Beas up to Pandoh. Posted on 21 Jun, 2010 04:37 PM

The study estimates the snow cover area for four major basins in the Himalayan region viz. Chenab up to Akhnoor, Ganga up to Devprayag, Satluj up to Bhakra and Beas up to Pandoh using IRS - IC and ID WiFS data. Snow cover estimation was done for the years 1997-2000 using image processing system ERDAS Imagine. The maximum and minimum snow cover extent for the month of September-October and March-April were delineated and on the basis of these the depletion curves for each basin was made for the four years. This output is useful for carrying out snowmelt runoff modeling.

Water balance study of Krishnai River Basin based on Thornthwaite’s concept of Potential Evapotranspiration: A research report by National Institute of Hydrology
The study aims to determine the climatological water balance of Krishnai river basin in Goalpura, Assam using the popular Thornthwaite’s concept of Potential Evapotranspiration (PET). Posted on 21 Jun, 2010 02:35 AM

The study aims to determine the climatological water balance of Krishnai river basin in Goalpura, Assam using the popular Thornthwaite’s concept of Potential Evapotranspiration (PET) to calculate the availability of water for various uses. The method offers a firm basis for appraising the problems related to water development projects in the planning stage and provides a sound footing for operating and managing the system. 

Rainfall-runoff analysis using Flood Analysis and Protection Systems model - A research report by National Institute of Hydrology
The study applies advanced models of design storm like Flood Analysis and Protection Systems (FLAPS) and HEC-1 for rainfall-runoff simulation. Posted on 21 Jun, 2010 02:29 AM

The study applies advanced models of design storm like Flood Analysis and Protection Systems (FLAPS) and HEC-1 for rainfall-runoff simulation employing selected short-term events of three basins of the north-eastern region – Myntdu-Leska (Meghalaya), Krishnai and Dudhnai (Assam). The results are used to study the sensitivity of the model parameters with respect to different hydrological parameters of the basin. The performance of these methods is evaluated by analyzing the isolated events. An attempt has been made to evaluate the non-linearity in rainfall-runoff response, using a simple storage-runoff dynamic model. The relationship of incipient soil moisture and transmissivity with direct runoff and recharge is studied.

Effect of forest cover changes on sediment yield of Upper Indravati reservoir catchment - Orissa: A research report by National Institute of Hydrology
The study uses remote sensing data to estimate the annual sediment load from the Upper Indravati catchment in Orissa for the year 2000. Posted on 21 Jun, 2010 02:08 AM

The study uses remote sensing data to develop a land use classification and applies statistical methods appropriate for Indian catchments to estimate the annual sediment load from the Upper Indravati catchment in Orissa for the year 2000. The study points to the fact that assessment of reservoir catchment regions at regular intervals would enhance the understanding of the geodynamic processes and help in identifying effective control measures.

Hydro-meteorological inventory of Orissa cyclones - A research report by National Institute of Hydrology
The study is based on investigations and collection of necessary information on the super cyclone in Orissa in October 1999. Posted on 21 Jun, 2010 01:38 AM

The study is based on investigations and collection of necessary information on the super cyclone in Orissa in October 1999. It examines cyclonic phenomenon in the country in general and Orissa in particular, and stresses the need for preparing a comprehensive plan for dealing with such disasters.

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