How is seepage measured in dam?

Measuring Embankment Dam Seepage

1. Short-Throated Flumes. Flumes are the most popular tools for measuring flows that exists.
2. Thin Plate Weirs. Another widely used water management tool is a thin plate weir.
3. Packaged Metering Manholes. Most dam seepage collection occurs above grade.

How can we detect the presence of seepage downstream of the dam?

A continuous or sudden drop in the normal lake level is another indication that seepage is occurring. In this case, one or more locations of flowing water are usually noted downstream from the dam.

How can we prevent seepage in dam?

Providing drainage filters is the best method to prevent seepage. Filters are provided for the free discharge of water and prevent piping and heaving. Drainages are used to reduce the pore water pressure inside the embankment and foundation soil.

How is seepage measured?

The basic concept of the seepage meter is to cover and isolate part of the sediment–water interface with a chamber open at the base and measure the change in the volume of water contained in a bag attached to the chamber over a measured time interval.

How do you manage seepage of soil?

One of the ways to control water seepage for irrigation canals is to reduce soil permeability; this can be made by compacting the soil. Soil compaction is carried out by means of special compactors, rammers and vibration machines.

What is seepage analysis?

What is a Seepage Analysis? Seepage Analysis is primarily concerned with water leaking from a contained source, generally a tank, a pool, a dam or similar structures, into the surrounding soil. It involves identifying the source of the leak and designing a solution to rectify the problem.

Why determination of seepage line is required?

The flow of seepage water, below the phreatic line, reduces the effective weight of the soil; as a result shear strength of a soil is reduced due to increased intergranular pressure in earth fill material. In this case, before going directly for derivation, the important features of phreatic line must be known.

What do you mean by seepage analysis of dam?

Seepage Analysis is primarily concerned with water leaking from a contained source, generally a tank, a pool, a dam or similar structures, into the surrounding soil. It involves identifying the source of the leak and designing a solution to rectify the problem.

What is flume in dam?

A flume is a human-made channel for water, in the form of an open declined gravity chute whose walls are raised above the surrounding terrain, in contrast to a trench or ditch. Flumes route water from a diversion dam or weir to a desired materiel collection location.

What measurement device is generally used to determine groundwater flow direction?

Colloidal borescope systems provide a direct means to accurately determine groundwater velocity, flow direction and particle sizes at depth-specific intervals. The colloidal borescope yields thousands of data points per minute for hours of statistically assured data.