How do I find the catchment area on Google Maps?
How do I find the catchment area on Google Maps?
- On your computer, open Google Earth.
- Search for a place, or select a location on the globe.
- On the left, click Measure. .
- Click the map to set measurement points.
- To remove a point, on the right, click Undo .
- To complete your line measurement, double-click on your last point, or click Done .
What is roof catchment area?
The roof of a building collects rainfall and directs rainfall through the roof drainage system. The roof of a building is referred to as the catchment area. The catchment area is the total area of the building that can capture and direct rainfall to the roof drainage system.
How is catchment area discharge calculated?
Q = 0.028 PfIcA = 0.028 x 0.10 x 0.60 x 2.98 x 80,000 = 400 cum/sec. When the catchment area is of clayey soil lightly covered, P from table 3.3 = 0.50, values of A, f and Ic remaining as before. Q = 0.028 PfIcA = 0.028 x 0.50 x 0.60 x 2.98 x 80,000 = 2003 cum/sec.
How do you find the catchment area for a contour map?
The catchment area of a river is determined by using contour map. The watershed line which indicates the drainage basin of a river passes through the ridges and saddles of the terrain around the river. Thus, it is always perpendicular to the contour lines.
What is catchment volume?
The catchment volume is calculated from the precipitation falling on the collection area with some loss due to the efficiency of the collection materials (and leaks). In addition, conversion factors are used to yield the desired units of volume.
How do you calculate discharge from runoff?
The Rational Formula is expressed as Q = CiA where: Q =Peak rate of runoff in cubic feet per second C =Runoff coefficient, an empirical coefficient representing a relationship between rainfall and runoff.
How do I make a catchment map?
Below, we walk you through the steps to build a catchment map to enable trade area analysis.
- Identify store location points.
- Identify methodology.
- Load the data into the geospatial processing tool of your choice.
- Perform the geoprocessing necessary for your methodology.
- Step 5: Publish the map with necessary map elements.
How do you calculate rainfall per area?
Find the average volume of rain = Depth x radius x radius x 3.14. Find the area at the top of the bucket (this is the area over which the rain is collected). Divide the rainfall volume by this area to get the rainfall.
How do you calculate catchment area for a drain?
It is simple. Just use your geometrical skills to calculate rooftop area or any other catchment area of small size. Using some simple multiplication and additions you can come up with the catchment area value in square meter. Measure length and width of the roof in meters and multiply both to get area in square meters.
How do you calculate the area of a catchment area?
The area is based on the “footprint” of the roof, which can be calculated by finding the area of the building and adding the area of the roof’s overhang. The image below shows how differences in roof slope do not change this building’s catchment area.
How to do rough catchment calculations in the field?
Here is a bit of a cheat sheet to do rough catchment calculations in the field found in Brad Lancaster Rainwater Harvesting book. Simple math of length times width reveals the first step which is to find the square footage or meters of the house or catchment area.
How do you size a rainwater catchment area?
Sizing a Catchment Area – The size of the catchment area or roof will determine how much rainwater that you can harvest. The area is based on the “footprint” of the roof, which can be calculated by finding the area of the building and adding the area of the roof’s overhang.
How is the catchment area of a river determined using contour map?
The catchment area of a river is determined by using contour map. The watershed line which indicates the drainagebasin of a river passes through the ridges and saddles of the terrain around the river. Thus, it is always perpendicularto the contour lines.
