Human factors affecting river discharge

Human factors affecting river discharge

A storm hydrograph The starting and finishing level show the base flow of a river. This increases lag time. This is the total volume of water flowing through a channel at any given point and is measured in cubic metres per second cumecs. Lag time — period of time between the peak rainfall and peak discharge. Smaller basins generally have shorter lag times because precipitation does not have as far to travel. Figure 1. The lag time is the delay between the maximum rainfall amount and the peak discharge. Physical Factors Affecting Storm Hydrographs There are a range of physical factors that affect the shape of a storm hydrograph. These can be used to show annual discharge patters of flow in relation to climate. This is because snow takes time to melt before the water enters the river channel. Storm hydrographs allow us to investigate the relationship between a rainfall event and discharge.

Physical Factors Affecting Storm Hydrographs There are a range of physical factors that affect the shape of a storm hydrograph.

Storm Hydrographs Hydrographs can be used to illustrate discharge. Physical Factors Relief Steep slopes encourage fast run off as the water spills rapidly downwards due to gravity.

what might cause the peaks in river discharge between november and march

Rainwater enters the river quicker, reducing lag times, as surface runoff is faster than baseflow or through flow. Temperature When the temperature is higher, river levels go down due to evaporation water lost from the surface and transpiration water lost from pores in vegetation.

what is river discharge

These include: 1. Heavy storms result in more water entering the drainage basin which results in a higher discharge.

Human Factors Affecting Storm Hydrographs There are a range of human factors that affect the shape of a storm hydrograph.

The discharge from a drainage basin depends on precipitation, evapotranspiration and storage factors. The type of precipitation can also have an impact.

Storm hydrograph

The shape of a hydrograph varies in each river basin and each individual storm event. Storm Hydrographs Hydrographs can be used to illustrate discharge. Human Factors Affecting Storm Hydrographs There are a range of human factors that affect the shape of a storm hydrograph. A storm hydrograph The starting and finishing level show the base flow of a river. Heavy storms result in more water entering the drainage basin which results in a higher discharge. Peak rainfall - the point on a flood hydrograph when rainfall is at its greatest. The hydrographs below show two contrasting environments. This is shown in the rising limb. This is the total volume of water flowing through a channel at any given point and is measured in cubic metres per second cumecs. These include: 1. Temperature When the temperature is higher, river levels go down due to evaporation water lost from the surface and transpiration water lost from pores in vegetation. This is because snow takes time to melt before the water enters the river channel. Storm flow - storm runoff resulting from storm precipitation involving both surface and throughflow.

Posted by. If a drainage basin has a significant amount of vegetation this will have a significant affect on a storm hydrograph.

physical factors are more important than human factors in affecting river discharge

Impermeable rock, e. Lag time — period of time between the peak rainfall and peak discharge.

Factors affecting river regime

On gentle slopes, absorption into the land reduces the volume of water reaching the river. Physical Factors Relief Steep slopes encourage fast run off as the water spills rapidly downwards due to gravity. This means infiltration levels decrease and surface runnoff increases. Rainwater enters the river quicker, reducing lag times, as surface runoff is faster than baseflow or through flow. Impermeable rock, e. The lag time is the delay between the maximum rainfall amount and the peak discharge. The lag time is likely to be greater if the precipitation is snow rather than rain. This is the total volume of water flowing through a channel at any given point and is measured in cubic metres per second cumecs. Storm hydrographs allow us to investigate the relationship between a rainfall event and discharge. Water is also lost due to evaporation and transpiration from the vegetation. The hydrographs below show two contrasting environments. This reduces the peak discharge of a river. Heavy storms result in more water entering the drainage basin which results in a higher discharge.

On gentle slopes, absorption into the land reduces the volume of water reaching the river.

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Factors affecting river discharge