APSC AE WRD 2019 Questions: Isohyet

Isohyet Multiple Choice Question

Question: An isohyet is a line joining points of:
(A) Equal rainfall intensity
(B) Equal storm duration
(C) Equal rainfall excess
(D) Equal rainfall depth

Answer: (D) Equal rainfall depth

Explanation

An isohyet is a line on a map that connects points receiving equal total rainfall depth over a specified period. It is a critical tool in hydrology and meteorology for mapping and analyzing rainfall distribution across a geographical area.

Related Terms

Term	Description
Isohyet	A line joining points of equal rainfall depth over a specified period.
Isochrone	A line joining points of equal time, often used in transportation or hydrology.
Isohaline	A line joining points of equal salinity, commonly used in oceanography.
Isobar	A line joining points of equal atmospheric pressure, used in meteorology.

Key Notes

• The isohyet is essential for understanding rainfall patterns and aiding in water resource management.
• Isohyets are used to create rainfall maps, which help in planning irrigation, flood control, and other hydrological applications.
• Unlike rainfall intensity (rate of rainfall) or rainfall excess (runoff after losses), isohyets specifically represent total rainfall depth.
• Accurate isohyet maps are vital for civil engineering and environmental planning projects.

Note: Isohyets play a significant role in hydrological studies, enabling efficient water management and infrastructure design by mapping rainfall distribution.

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