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A, B and C are three catchments each having an area of about 10,000 km2 situated in an arid zone, mountainous region of a tropical zone and flat region of a tropical zone respectively. The desirable number of hydrometeorological stations for each of these three areas, NA, NB and NC respectively will be such that
  • a)
     NB > NC> NA
  • b)
    NA < NB< NC
  • c)
     NA > NB > NC
  • d)
     NB = NC and NB > NA
Correct answer is option 'A'. Can you explain this answer?
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A, B and C are three catchments each having an area of about 10,000 km...
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A, B and C are three catchments each having an area of about 10,000 km...
>The desirable number of hydrometeorological stations for each catchment will depend on various factors such as topography, climate, land use, and hydrological characteristics. However, we can make some generalizations based on the information provided.

For the arid zone catchment (A), which is mountainous, a higher number of hydrometeorological stations will be desirable compared to the other two catchments. This is because mountainous regions are characterized by high spatial variability in precipitation, temperature, and other meteorological variables due to the complex topography. Therefore, a higher number of stations will be required to capture this variability and provide accurate information on the water balance and hydrological processes.

For the tropical zone catchments (B and C), the number of desirable stations will depend on the specific characteristics of each catchment. However, we can assume that the flat region (C) will require a lower number of stations compared to the mountainous region (A) due to the lower spatial variability in meteorological variables. On the other hand, the tropical mountainous region (B) may require a higher number of stations compared to the flat region (C) but lower than the arid mountainous region (A).

Therefore, based on this reasoning, the desirable number of hydrometeorological stations for each catchment can be ranked as follows:

A > B > C

In other words, the arid mountainous catchment (A) will require the highest number of stations, followed by the tropical mountainous catchment (B), and the tropical flat catchment (C) will require the lowest number of stations. However, the specific number of stations for each catchment will depend on detailed hydrological and meteorological analyses.
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