what is meant by 20 cm rainfall?
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Answered by
54
hey friend!!
here's the answer.......................
Rainfall (or precipitation) is measured as an absolute depth thus with a unit of length (i.e. mm, cm or inches depending on the chosen metric system) and refers to the net rainfall impacting earth surface and therefore does not account for evaporation losses say from changes in temperature and/or pressure due to altitude and terminal velocity.
Measuring rainfall as a depth has become an international standard mainly because it is very easy to convert depth to volume; in fact, the main conversion factor is 1 mm of rainfall = 1 Liter of water/m² (or 0.001 m³ of water/m²); thus, to answer your question, 200cm or rainfall (or 2000 mm) means that every squared metre of land in the inner vicinity of the rain gauge received 2 m³ of water which has either turned into runoff or recharge to the shallow groundwater system via infiltration (and a small portion will evaporate too). Remember that rainfall distribution is (highly) spatially variable thus be very careful using rainfall data for areas that are not close to the rain gauge (a few km is a good rule of thumb).
Say you would like to estimate how much water has been collected from a roof area (thus completely impervious) of 250 m² during a day which experienced 12 mm of rainfall:
12 mm of rainfall = 0.012 m³/m² as per the above relationship, then (0.012 m³/m²)*250m² = 3 m³ of water.
The same process can be used to calculate net precipitation over larger areas using a combination of radar data sets in GIS to interpret spatial distribution and applying a correct loss model for different land use types coupled with an integrated hydrological model.
hope it helps!!!
here's the answer.......................
Rainfall (or precipitation) is measured as an absolute depth thus with a unit of length (i.e. mm, cm or inches depending on the chosen metric system) and refers to the net rainfall impacting earth surface and therefore does not account for evaporation losses say from changes in temperature and/or pressure due to altitude and terminal velocity.
Measuring rainfall as a depth has become an international standard mainly because it is very easy to convert depth to volume; in fact, the main conversion factor is 1 mm of rainfall = 1 Liter of water/m² (or 0.001 m³ of water/m²); thus, to answer your question, 200cm or rainfall (or 2000 mm) means that every squared metre of land in the inner vicinity of the rain gauge received 2 m³ of water which has either turned into runoff or recharge to the shallow groundwater system via infiltration (and a small portion will evaporate too). Remember that rainfall distribution is (highly) spatially variable thus be very careful using rainfall data for areas that are not close to the rain gauge (a few km is a good rule of thumb).
Say you would like to estimate how much water has been collected from a roof area (thus completely impervious) of 250 m² during a day which experienced 12 mm of rainfall:
12 mm of rainfall = 0.012 m³/m² as per the above relationship, then (0.012 m³/m²)*250m² = 3 m³ of water.
The same process can be used to calculate net precipitation over larger areas using a combination of radar data sets in GIS to interpret spatial distribution and applying a correct loss model for different land use types coupled with an integrated hydrological model.
hope it helps!!!
Answered by
13
20 cm rainfall on flat surfaces
Explanation:
- Rain gauge is a tool that is employed to live quantity of downfall.
- It is for the most part utilized by metrologist to live the number of precipitation.
- A standard pluviometer contains a funnel, associate degree exceedingly|in a very} inner cylinder and an outer cylinder, The graduate is a pair of cm in radius, that is within associate outer cylinder maesuring twenty cm in diameter.
- The climate of Asian nation is represented because the monsoon kind. The word monsoon springs from the Arabic word mausim which accurately suggests that season. Monsoon refers to the seasonal reversal within the wind direction throughout a year.
- This type of climate is found primarily within the south and also the geographic area. Despite associate overall unity within the general pattern, there ar perceptible regional variations in climate among the country. In summer, the mercury sometimes touches 50C in some components of the Rajasthan desert, whereas it's going to be around 20C in Pahalgam in Jammu and geographical area. On a winter night, temperature at Drass in Jammu and geographical area is also as low as minus 45C. Tiruvananthapuram, on the opposite hand, could have a temperature of 20C. In sure places.
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