Browsing Technical Reports by Issue Date

TR-21 : Development of a variable parameter simplified hydraulic flood routing model or trapezoidal channels

Perumal, M. (National Institute of Hydrology, 1986)

A variable parameter simplified hydraulic method based on the approximation of the St.Venant's equations which describe the one dimensional flow in a channel or river has developed for routing ...

TR-27 : Comparison of some variable parameter simplified hydraulic flood routing models

Perumal, M. (National Institute of Hydrology, 1986)

The three point variable parameter Muskingum Cunge method envisaged by Ponce and Yevjevich is based on the concept of relating the physical diffusion with the numerical diffusion at every routing ...

TR-12 : Field measurement of soil moisture movement in ponding condition

Chand, Ramesh (National Institute of Hydrology, 1986)

Soil moisture movement studies provide potential information in the field of agriculture and hydrology. In the field of agriculture information is needed for many diverse applications including ...

TR-17 : Simple techniques for forecasting of monsoon rainfall and runoff and application to Mahanadi river at Hirakund

Goel, N. K. (National Institute of Hydrology, 1986)

Monsoon period (June to Oct.) is a crucial period as nearly 90% of annual rainfall and runoff is received during this period in Indian subcontinent. The water resources planning activities e.g. . ...

TR-13 : Development of a variable parameter simplified hydraulic flood routing model for rectangular channels

Perumal, M. (National Institute of Hydrology, 1986)

A variable parameter simplified hydraulic method based on the approximation of the St. Venant's equations which describe the one dimensional flow in a channel or river has been developed for routing floods in channels ...

TR-10 : Determination of reach transmissivity under various hydrologic boundary conditions

Mishra, G. C. (National Institute of Hydrology, 1986)

Reach transmissivity for a canal or stream is a site specific constant which depends on canal geometry and aquifer boundary. The reach transmissivity, when multiplied with depth to water table position from the water ...

TN-28 : Study of soil moisture using neutron probe

Raghuwanshi, N. S.; Bhatia, K. K. S. (National Institute of Hydrology, 1986)

The fundamental importance of maintaining soils to meet the food and fiber needs of a burgeoning world population merits the attention and concern of all people. Erosion of soil by water poses an increasing threat as ...

TR-4 : Statistical analysis of rainfall in Belgaum district, Karnataka

Seth, S. M.; Ramasastri, K. S.; Nirupama, P. (National Institute of Hydrology, 1986)

Belgaum district in Karnataka has been experiencing drought continuously for the past few years. To study the phenomenon of low rainfall in the district, statistical analysis of ...

TR-15 : Mathematical modelling of moving storms

Ramasastri, K. S. (National Institute of Hydrology, 1986)

The magnitude of peak flood and the shape of a flood hydrograph depend not only on the magnitude of total storm rainfall depths but also on its distribution in space and with ...

TR-14 : Estimating evaporation losses from lakes and reservoirs

Sikka, A. K.; Goyal, S. K. (National Institute of Hydrology, 1986)

Engineers, planners and all concerned with water resources require an estimate of evaporation losses from lakes and reservoirs for the efficient reservoir operation and the water balance ...

TR-19 : Recharge from large depression storage

Seethapathi, P. V.; Singh, Sushil K. (National Institute of Hydrology, 1986)

The transient analysis of the groundwater flow around a lake of square cross section and having uniform depth has been analysed for a hypothetical setting of the boundaries (rivers on the lateral sides of the lake and ...

TR-25 : Surface fitting of groundwater table by means of least square approach

Seethapathi, P. V.; Singh, Sushil K. (National Institute of Hydrology, 1986)

With the advent of high speed computers, the model studies for the analysis of complex groundwater flow problems, have become a common practice. For carrying out such model studies, the special ...

TR-11 : Study of parameters affecting base flow

Chachadi, A. G.; Mishra, G. C. (National Institute of Hydrology, 1986)

Base flow computation plays an important role for assessment of lean flow in a river. airing passage of flood in a river the river stage rises which leads to recharging of the ...

TR-16 : Overland flow modelling

Palaniappan, A. B.; Ramasastri, K. S. (National Institute of Hydrology, 1986)

Surface flow estimation is needed by planners and managers of water resource system. Most of the analysis are based on linear systems, wherein the watershed is assumed to be virgin. But, ...

TR-2 : Suitability of power transformation based Gumbel EV-1 distribution for flood frequency analysis

Seth, S. M.; Singh, R. D.; Perumal, M. (National Institute of Hydrology, 1986)

Estimation of a flood corresponding to a specified recurrence interval at a particular point on a river system is the most common problem for the engineers, scientists and others involved in design ...

TR-22 : Leaching requirement of agricultural land and study of movement of salts

Mishra, G. C. (National Institute of Hydrology, 1986)

One of the major problems associated with irrigated agriculture land is accumulation of salt in the soil which results in low productivity if proper water management practices are ...

TR-23 : Determination of aquifer recharge for varying river stages

Mishra, G. C. (National Institute of Hydrology, 1986)

In a sedimentary groundwater basin occurrence of multiple aquifer separated by confining layers of low and negligible permeability is quite common. A stream in such basin may penetrate either partially or fully the top ...

TR-3 : Storage in confined aquifer with flowing artesian well

Chandra, Satish; Mishra, G. C. (National Institute of Hydrology, 1986)

Flowing wells are uncommon occurrences resulting from erratic geological process. The discharge of a flowing well depends on the difference between the elevations of the piezometric head in the aquifer ...

TR-29 : Estimation of soil moisture variation using resistivity technique

Goyal, V. C. (National Institute of Hydrology, 1986)

Relation between bulk resistivity and amount of pore water as well as its properties has been known in form of empirical formulae. The electrical properties of soils in unsaturated zone above water table are dependent ...

TR-6 : Water quality modelling of rivers

Bhatia, K. K. S.; Jain, C. K. (National Institute of Hydrology, 1986)

Water quality in flowing waters, is closely linked to the total water quality in the basin and hence it becomes imperative that water quality assessment and river basin planning ...

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