Understanding River Regimes and Flooding

What factors contribute to the variability in a river's discharge throughout the year?

• Only temperature changes

• Precipitation, temperature, evapotranspiration, and drainage basin characteristics

• Just the amount of rainfall

• Only the presence of snowmelt

In Southeast Asia, why is river discharge typically higher during July and August?

• Because precipitation is at its highest

• Due to increased human activity

• Because of lower temperatures

• Due to decreased evapotranspiration

What is the purpose of a flood hydrograph?

• To calculate the speed of river currents

• To measure the temperature of a river

• To predict the amount of snowmelt

• To display the amount of rainfall and river discharge

Which factor does NOT contribute to rapid surface runoff and potential flooding?

• Steep slopes

• Dense vegetation

• Impermeable rock surfaces

• Urban concrete surfaces

What is a positive impact of flooding on agriculture?

• Contamination of water sources

• Increased soil erosion

• Deposition of fertile silt called alluvium

• Destruction of crops