📘 hydrology

1. **Problem Statement:** Estimate the Curve Numbers (CN I, CN II, and CN III) for a catchment area with given land use percentages and soil groups B and C.

1. **State the problem:** We need to estimate the Curve Numbers (CN I, CN II, CN III) for a catchment area with given land use percentages and soil groups B and C. 2. **Understand

1. **Problem Statement:** We have a 500 ha watershed with a Curve Number (CN) of 68 and initial abstraction ratio $I_a = 0.35$. We want to estimate runoff volume for two cases of r

1. **State the problem:** We need to estimate the Curve Numbers (CN) I, II, and III for a catchment area with given land use percentages and soil groups B and C. 2. **Given data:**

1. **Problem Statement:** Estimate the runoff volume for a 400 ha watershed with initial abstraction $I_a = 0.1S$ and Curve Number (CN) II value of 73, given rainfall of 65 mm on D

1. **Problem Statement:** We have a 500 ha watershed with a Curve Number (CN) of 68 and initial abstraction ratio $I_a = 0.35$. We want to estimate runoff volume for two cases of r

1. **State the problem:** We need to estimate the peak flooding from a catchment area using the rational method. 2. **Given data:**

1. **State the problem:** We have a catchment area of 1500 m² that received $x$ mm of rainfall in July. 2. The evaporation loss is given as 15 cm, which equals 150 mm (since $1$ cm

1. **State the problem:** We have a catchment area of 1500 m² that received $x$ mm of rainfall in July. The evaporation loss is 15 cm, and the average flow rate at the outlet is 1.