1. What is Time Interval From Peak In Straight-Line Method?

The Time Interval from Peak in Straight-Line Method is a hydrological parameter used in baseflow separation analysis. It represents the time interval from the peak flow in a hydrograph using the straight-line method for separating baseflow from surface runoff.

2. How Does the Calculator Work?

The calculator uses the formula:

Where:

• \( N \) — Time Interval (Days)
• \( A_D \) — Drainage Area (m²)

Explanation: The formula calculates the time interval from the peak flow based on the drainage area size, with the coefficient 0.83 and exponent 0.2 derived from empirical hydrological studies.

3. Importance of Time Interval Calculation

Details: Accurate time interval calculation is crucial for proper baseflow separation, which helps in understanding groundwater contributions to streamflow, water resource management, and flood forecasting.

4. Using the Calculator

Tips: Enter the drainage area in square meters. The value must be valid (drainage area > 0).

5. Frequently Asked Questions (FAQ)

Q1: What is baseflow separation?
A: Baseflow separation is the process of distinguishing between surface runoff and groundwater flow (baseflow) in a stream hydrograph.

Q2: Why use the straight-line method?
A: The straight-line method is a simple and widely used technique for baseflow separation that assumes a linear recession of baseflow.

Q3: What factors affect the time interval?
A: The time interval is primarily influenced by the size of the drainage area, with larger areas typically having longer time intervals.

Q4: Are there limitations to this method?
A: The straight-line method is a simplification and may not accurately represent complex hydrological systems with varying geological conditions.

Q5: Can this method be used for all watersheds?
A: While generally applicable, the method may need adjustment for watersheds with unusual characteristics or extreme hydrological conditions.