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Feb 26, 2016 / Haseeb Jamal -

5 Travel Myths You Need to Stop Believing Right Now

Feb 26, 2016 / Haseeb Jamal -

Canal Comes Alive with Lighted Boat Parade.

By Haseeb Jamal - Sep 20, 2018

Purposes of Dams - Importance, Functions and Applications

Dams and reservoirs are built to raise water level for storage and safe retention of large quantity of water. Water is subsequently released to achieve various purposes. Dams may be constructed to meet one or more purposes as: Irrigation, Hydropower development (Tarbela Dam, Mangla Dam), Domestic, municipal, industrial water

Environmental Impacts of Dams

In this way, serious accidents can occur: the dams are only built to withstand a certain amount of water pressure; with the pressure from the sediment in some time the wall either explodes or water is caused to go above the dam, creating a waterfall; in both cases, a lot of organisms, including humans are in great danger. Dams are created in order to change the currents
By Haseeb Jamal - Oct 15, 2017

Typical Cross Section of Earth Filled Dams

1. Sheet Pile wall 2. Core wall + Sheet pile wall or Cut off wall 3. Core wall + Cut off trench 4. Core wall + Impervious blanket at the upstream surface 5. Flattening the downstream face 6. Rockfill toe on the downstream 7. Horizontal drainage / filter on the downstream side 8. Providing coarse section on the downstream face of the dam. There are three

Parameters considered in Designing Spillways

The topography, hydrology, hydraulics, geology and economic considerations all have a bearing on these decisions. For a given inflow flood hydro graph, the maximum rise in the reservoir level depends on the discharge characteristics of the spillway crest and its size and can be obtained by flood routing. Trial with different sizes can then help in getting the optimum combination
By Haseeb Jamal - Aug 31, 2017

Tunnels in Dams - Advantages and Application

The type of intake structure depends on its location and function and on the various appurtenances, such as fish-screens, trashracks, stoplog arrangements, or operating platforms that must be furnished. A means for dissipating the energy of flow before returning the discharge to the river should normally be provided. This can be accomplished by a flip bucket
By Haseeb Jamal - Jul 23, 2017

Stability and Failure of Earth Filled Dams

This type of dam is made up of only one type of material. Usually porous materials is used. These dams are easy and cheap to construct but cannot be used to make multipurpose large dams. For large multipurpose dams zoned type method is used. Over topping failures result from the erosive action of water on the embankment. Erosion is due to

Spillway Control Devices - FlashBoards and Stop Logs

The simplest form of control for a spillway is the free, or uncontrolled, overflow crest, which automatically releases water whenever the reservoir water surface rises above crest level. The advantages of the uncontrolled crest are the elimination of the need for constant attendance and regulation of the control devices by an operator and the freedom from maintenance

Spillway - Definition, Types and Classification of Spillway

There are different types of spillways that can be provided depending on the suitability of site and other parameters. Generally a spillway consists of a control structure, a conveyance channel and a terminal structure, but the former two may be combined in the same for certain types. The more common types are briefly described below: Drop, Ogee, Siphon Chute,

Requirements Of Small Hydro Power Project

All civil works must be durable and maintainable to 15 years, except in cases of specific components where rebuild is explicitly included and costed in the management plan. Civil works must be designed for adequate and safe performance at minimum expense. Reliable methods of diverting flow from the silt basin, canal, forebay, and from the penstock, so that
By Haseeb Jamal - Jul 13, 2017

Seepage through Earth Filled Dams - Definitions

Each flow path transmits the same quantity of seepage. Area bounded by two consecutive flow lines and equipotential lines is a square. Flow channel: Space between two consecutive flow lines is called flow path / flow channel. Equipotential Lines: Location of phreatic surface / phreatic line / top flow line. Properties of Flownet. Each flow path transmits the same

Reinforced Concrete Rock Fill Dams

Rock fill dams are considered to be one of the durable types of dams and can be very economical depending upon the availability of materials to be used in Dam. More rock fill dams have been faced with conventionally placed reinforced concrete than with any other type of impervious membrane. In most cases, these facings have performed well for correctly
By Haseeb Jamal - Jun 09, 2017

Phreatic Line and Horizontal Drain In Earth Fill Dams

Earth dams are generally built of locally available materials in their natural state with a minimum of processing. Homogeneous earth dams are built whenever only one type of material is economically available. The material must be sufficiently impervious to provide an adequate water barrier and slopes must be relatively flat to make it safe against piping and sloughing.

Hydropower Projects Planning and Implementation

Hydropower (from hydro, meaning water) is energy that comes from the force of moving water. The fall and movement of water is part of a continuous natural cycle called the “water cycle”. Energy from the sun evaporates water in the Earth’s oceans and rivers and draws it upward as water vapor. When the water vapor reaches the cooler air in the atmosphere, it condenses

Advantages and Disadvantages of Hydropower Plants

Hydropower is the most widely used renewable energy technology. It is a mature technology and its strengths and weaknesses are equally well understood. Advantages and disadvantages of hydropower schemes can be listed in terms of economic, social and environmental aspects. Hydropower plants can provide peak load service. Their fast response times enable

Munda Headworks Reconstruction on River Swat

The recent floods in 2010 have badly destroyed the headworks and causing a huge loss the agriculture potential of the area and country as well but due to strong struggle and insists of the people of shabqadar ( Merzai, Katozai, Mahzara etc). It was reconstructed in record time. If in case it was not constructed in time it may have cause a huge loss to the agriculture

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