The runoff from a catchment is estimated by the following methods: 1. Standard Tables 2. Empirical Formulae 3. Rainfall Runoff Correlation. Method # 1. Standard Tables: Observations of precipitation and the resulting runoff were taken for a number of catchments having different characteristics. Tables are prepared showing the relation between precipitation and the resulting runoff, […]
Estimation of Runoff from a Catchment | Precipitation | Geography
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Measuring the Average Depth of Rainfall: 3 Methods | Atmosphere | Geography
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For any time duration, the average depth of rainfall falling over a catchment can be found by the following three methods: 1. The Arithmetic Mean Method 2. The Thiessen Polygon Method 3. The Isohyetal Method. 1. The Arithmetic Mean Method: The simplest of all is the Arithmetic Mean Method, which taken an average of all […]
Hydrograph Representing Run-Off | Rainfall | Hydrology | Geography
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In this article we will discuss about the hydrograph representing run-off of rainfall, with the help of suitable diagrams. Hydrograph is defined as a graph showing discharge (run-off) of flowing water with respect to time for a specified time. Discharge graphs are known as flood or run-off graphs. Each hydrograph has a reference to a […]