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Catchment Area for Hydrograph Analysis refers to an area of land where all water flows to a single stream, river, lake or even ocean. It is a fundamental concept in hydrology for understanding water flow patterns and flood prediction.
The calculator uses the formula:
Where:
Explanation: This formula establishes a mathematical relationship between the time duration after peak flow and the corresponding catchment area size for hydrograph analysis.
Details: Accurate catchment area calculation is crucial for flood forecasting, water resource management, and designing hydraulic structures. It helps in understanding the watershed characteristics and predicting runoff patterns.
Tips: Enter the number of days after the peak is achieved. The value must be a positive number greater than zero.
Q1: What is a hydrograph in hydrology?
A: A hydrograph is a graph showing the rate of flow (discharge) versus time past a specific point in a river, channel, or conduit carrying flow.
Q2: Why is the number of days after peak important?
A: The number of days after peak helps in analyzing the recession limb of the hydrograph, which provides information about catchment storage and drainage characteristics.
Q3: What are typical catchment area sizes?
A: Catchment areas can range from very small (few square kilometers) to very large (thousands of square kilometers) depending on the geographical region and water system.
Q4: Are there limitations to this formula?
A: This formula provides an estimation and may need to be calibrated for specific geographical regions and hydrological conditions.
Q5: How accurate is this calculation method?
A: The accuracy depends on various factors including the consistency of hydrological data, catchment characteristics, and the specific conditions being analyzed.