Storm hydrographs allow us to investigate the relationship between a rainfall event and discharge. Prince Charles visited the town 2 days after the flood and donated a large sum of money to the town.
Floods can cause extensive damage to infrastructure such as power lines, roads, water pipes etc. Short Term Responses A flood warning was issued for parts of Cornwall at 3: Water can cause a lot of damage to property and when it picks up large chunks of debris such as cars, it can act like a wrecking ball, taking out chunks of buildings when cars crash into them.
In a MEDC, people and governments are better prepared for floods. The increase in discharge can be triggered by several events.
This increased surface runoff due to a lack of both infiltration and interception, increasing the volume of water entering the River Valency and its tributaries. The amount precipitation can have an effect on the storm hydrograph. Heavy storms result in more water entering the drainage basin which results in a higher discharge.
In a MEDC, property damage is often extensive as people have lots of expensive possessions. The Northside Bridge in Workington, Cumbria collapsed when there were large floods in As the River Valency flowed through Boscastle, its channel had been walled off preventing it from adjusting to the increased discharge and limiting its efficiency, ultimately causing it flood.
This is because snow takes time to melt before the water enters the river channel. The economic impact of infrastructure damage and unemployment is larger in MEDCs since these countries have modern and expensive infrastructure in place.
This leads to a short lag time and an increase in peak discharge.
Climate change is a physical factor that could, potentially, be a human factor. Very large and powerful floods can even dislodge buildings from their foundations and move them.
A winter storm i. Out of a data set spanning years 5this flood was the 2nd largest in terms of discharge.River Discharge. River discharge is the volume of water flowing through a river channel. This is the total volume of water flowing through a channel at any given point and is measured in cubic metres per second (cumecs).
Human factors affecting storm hydrographs. Peak discharge – the point on a flood hydrograph when river discharge is. River discharge is defined as the volume of water passing a measuring point or gauging station in a river in a given time.
It is measured in cubic metres per second (cumecs). The overall discharge from the drainage basin depends on the relationship between preciptiation and storage factors and can be summarised as follows.
Factors affecting river discharge Factors affecting river discharge The storm hydrograph shows variations in a river's discharge over a short period of time, usually during and immediately following a rainstorm. Factors affecting a river's discharge.
Rock and soil type · Permeable rocks ad soils (such as sandy soils) absorb water easily, so surface run-off is rare · Impermeable rock and soils (such as clay soils) are more closely packed. Rainwater can’t infiltrate, so water reaches the river more quickly.
Human and physical factors affecting the River Nile's discharge The livelihood and stability of Egypt's population is directly linked to the Nile valley and delta.
These two regions account for less than 5% of Egypt's land surface but the agriculture and water sources are largely concentrated in these areas.
Discharge & Hydrographs. By Alex Jackson. Last The discharge of a river (or stream) is the volume of water that flows past a point in the river’s course per second. The volume is indicating that the discharge is increasing.
The falling limb is the opposite showing that the discharge is falling.
Factors Affecting a Storm Hydrograph.Download