How do you identify a catchment area?

Catchment areas can be defined by distance, by travel time, and by mobility patterns, allowing you to analyze where foot traffic comes from in a variety of ways. Catchment areas are often used to better analyze foot traffic and store visit rates.

How do you determine a catchment area?

The catchment area is the total area of land that contributes runoff into the dam. For relatively small catchments it may be possible to determine their area from farm plans, aerial photos of the farm or by actually measuring it out on the ground with a vehicle or global positioning system (GPS).

What is a catchment area examples?

For example, a school catchment area is the geographic area from which students are eligible to attend a local school. When a facility's capacity can only service a specific volume, the catchment may be used to limit a population's ability to access services outside that area.

What is the formula for the area of catchment?

At any point along this third slope line, a contour line can be constructed to the edges of the stream tube, and specific catchment area can be calculated as a = A/w using the area A above the contour line and length w of the contour line.

What are characteristics of catchment?

Catchment characteristics obtained from maps and the Data Base of the Water Resources Management Department were: Catchment Area (AREA), Main Stream Length (MSL),Slope as (S1085) Stream frequency (STRFQ), Mean Annual Rainfall (MAR) and Potential Evaporation (PE) (Ruks et al, (1970)).

What is a Catchment Area and how does it work?

How do you define catchment boundaries?

A catchment is the land area from which all run-off water flows to form a waterway. Its boundary is the natural features, such as hills and mountains, which surround it, forming what is known as the watershed.

What are natural catchment areas?

A catchment is an area with a natural boundary (for example ridges, hills or mountains) where all surface water drains to a common channel to form rivers or creeks. Larger catchments are made up of smaller areas, sometimes called subcatchments[2].

What is the catchment area length?

The catchment length (or hydraulic length) is the length measured along a principal watercourse. The length to catchment centroid is the length measured along the principal watercourse, from the catchment outlet to a point located closest to the catchment centroid.

What is the slope of the catchment area?

The average catchment slope is consequently defined as the average slope perpendicular to the nearest contour line at each grid point. This is presented diagram-matically in Figure 3 and expressed by Equation 1 (Alexander 2001). N = number of grid points. M = total length of all contour lines within the catchment (m).

What is the catchment area of runoff?

Catchments are areas of land where runoff collects to a specific zone. This movement is caused by water moving from areas of high energy to low energy due to the influence of gravity. Catchments often do not last for long periods of time as the water evaporates, drains into the soil, or is consumed by animals.

What is the difference between a catchment area and a watershed?

Catchment area: It refers to all the area of land over which rain falls and is caught to serve a river basin. The catchment area of large rivers or river system is called a river basin while those of small rivers, a lake, a tank is often referred to as a watershed.

What is the importance of a catchment area?

A healthy water catchment provides high-quality drinking water and supports livelihoods such as agriculture, recreational angling and water sports. It also supports local ecosystems so plants, animals, fish and insects that depend on having healthy water can thrive and flourish.

What is the yield of a catchment area?

The total quantity of surface water that can be expected in the given period from a stream at the outlet of its catchment is known as the yield of the catchment in that period.

What is the highest point of a catchment?

The outside edge of a catchment is always the highest point. Gravity causes all rain and runoff in the catchment to run downhill where it naturally collects in creeks, rivers, lakes or oceans.

What is the difference between a catchment area and a river?

The difference between Catchment Area and River Basin is that a catchment area is a specific area from where a river drains the collected water, whereas a 'river basin' is the drainage basin where a river and its tributaries drain all the water.

What is a synonym for catchment area?

Definitions of catchment area. the entire geographical area drained by a river and its tributaries; an area characterized by all runoff being conveyed to the same outlet. synonyms: basin, catchment basin, drainage area, drainage basin, river basin, watershed.

What is a 75% dependable yield of a catchment?

Thus, 75% dependable annual yield is the value that can be expected to be equalled to or ex- ceeded 75% times (i.e. on an average 15 times in a span of 20 years). Similarly, 50% dependable yield is the annual yield value that is likely to be equalled or exceeded 50% of times (i.e. on an average 10 times in 20 years).

What is the shape of the catchment?

A catchment is a basin shaped area of land, bounded by natural features such as hills or mountains from which surface and sub surface water flows into streams, rivers and wetlands. Water flows into, and collects in, the lowest areas in the landscape.

What is a dependable yield of a catchment?

Dependable yield means that maintainable yield of water from a surface or ground water source(s) which is available continuously during projected future conditions, including a repetition of the most severe drought of record, without creating undesirable effects, as determined by the Depart- ment.

What are the factors affecting catchment area?

What is the catchment capacity?

Each square meter (square foot) of roof area will capture 7.37 liters (0.46 gallons) of rainwater for one centimeter (inch) of rainfall. Sizing the system: Storage tank capacity (liters) = water catchment area (m2) x rainfall (cm) x 7.38.

Which river has the largest catchment area?

The major river basin is the Ganga-Brahmaputra-Meghna , which is the largest with catchment area of about 11.0 lakh km² (more than 43% of the catchment area of all the major rivers in the country). The other major river basins with catchment area more than 1.0 lakh km² are Indus, Mahanadi, Godavari and Krishna.

Is a drainage basin a catchment area?

Other terms for a drainage basin are catchment area, catchment basin, drainage area, river basin, water basin, and impluvium. In North America, they are commonly called a watershed, though in other English-speaking places, "watershed" is used only in its original sense, that of a drainage divide.

What's the meaning of catchment?

A catchment is an area of land where water collects when it rains, often bounded by hills. As the water flows over the landscape it finds its way into streams and down into the soil, eventually feeding the river. Some of this water stays underground and continues to slowly feed the river in times of low rainfall.

What is it called when water soaks into the ground through the soil?

Infiltration. Infiltration happens when water soaks into the soil from the ground level. It moves underground and moves between the soil and rocks. Some of the water will be soaked up by roots to help plants grow.