Flood Hydrograph Flashcards
How is river discharge measured?
Cumecs
Maximum water capacity of the ground
Field capacity
Water surplus
Water surplus exists where supply exceeds demand
Soil moisture utilisation
precipitation no longer is able to meet the demands of potential evapotranspiration
Soil moisture recharge
a time when water is added to soil moisture storage
Potential evapotranspiration
the combined loss of water through: 1) the plant’s process of transpiration via its vascular system, and 2) evaporation of water from the earth’s surface
Water deficit
A combination of limited water absorption and high evaporative demand
What is rainfall measured in?
milliliters
What graph is used to show rainfall?
Line graph
Why does the lag time occur?
Takes time for water to reach the river
How would a flood hydrograph look different in an urban area when compared to a rural area?
Shorter lag time in urban areas
What is the term to describe when the river is full?
Cresting, in flood
