lesson 1 hydrological
DESCRIPTION
Used with AS students.TRANSCRIPT
Rivers, Floods & Management
1.1. To understand the concept of a system To understand the concept of a system and how this applies to rivers.and how this applies to rivers.
2.2. To be able to draw and annotate To be able to draw and annotate hydrological cycle and drainage basin.hydrological cycle and drainage basin.
3.3. To explain different movements through To explain different movements through the cycle.the cycle.
The Water CycleThe water cycle is a closed
system because "water" comes in three forms or phases: solid, liquid and gas. Water can change
phases by melting, evaporating, sublimating,
freezing or condensing, but it is still water. The "closed system" is one where the basic material is neither
being created nor destroyed-- just moving
between phases.
The water cycle
So why is the hydrological cycle not closed?
In an open system there is movement of both energy and materials in and out of the system. All environmental systems,
including the hydrological cycle, are open systems.
The Drainage basin
Where can drip go?
clouds
Vegetation store Trees and plants
Surface store Rivers, lakes and glaciers
Soil store
Groundwater store
Sea
Key
The arrows show transfers of water
The boxes show stores of water
Words to add to arrows not labelled.Evaporation (twice), Interception, Infiltration, Evapotranspiration, Percolation, Infiltration. Surface runoff, Groundwater flow, Throughflow, condensation. The arrow with a star does not need a label.
Outcomes
1. All students will know key terminology for hydrological cycle and drainage basin. Why rivers
are important to man and the basics of hydrological cycle.
2. Some students will also be able to describe the cycle as a system of inputs stores and outputs.
3. A few will progress even further to know difference between water cycle and hydrological cycle.