A hydrograph shows the changing discharge of a stream or river over time. It is created by plotting discharge values against time. Hydrographs provide insight into the flow behavior of a watershed and can be used to analyze flooding events, water resource management, and impacts of land use changes on stream flow.
Firstly an attenuation is the reduction in the peak of a hydro-graph as it movesdownstream, resulting in a more broad, flat hydro-graph.Therefore the attenuated peak is the highest point before it attenuates.
The types of mechanical work include static work, dynamic work, and intensive work. Static work refers to work done without motion, dynamic work involves movement, and intensive work focuses on the internal energy changes within a system.
Input work is the work done on a machine, while output work is the work done by the machine. Efficiency of a simple machine is calculated as the ratio of output work to input work. The efficiency of a simple machine is high when the output work is close to the input work, indicating that the machine is converting most of the input work into useful output work.
The formula that relates work and power is: Power = Work / Time. Power is the rate at which work is done, which is the amount of work done divided by the time it takes to do that work.
the work a machine does is the work output what it takes to do the work is the work input
the time between the heaviest rainfall and the peak discharge
The unit of hydrograph for an infinitesimally small duration of effective rainfall is called unit hydrograph. It represents the response of a watershed to a unit input of effective rainfall over time.
A hydrograph is showing the discharge (rate of flow) versus the time past in a specific river point. One of the types of hydrography is called a flood hydrograph, it is used to measure the river's characteristic basically a dual plot of discharge and rainfalls.
how do you compare and contrast hydrographs
the amount of discharge in a river over a period of time
To calculate the lag time of a hydrograph, you first identify the peak discharge point on the hydrograph and then locate the corresponding point where the rainfall event begins. The lag time is the time difference between the start of the rainfall and the peak discharge, typically measured in hours. This value helps in understanding the response of a watershed to precipitation events.
The shape of a storm hydrograph is influenced by factors such as precipitation intensity, duration, and distribution, as well as the characteristics of the watershed such as size, slope, soil type, land use, and vegetation cover. These factors determine how quickly water enters the river system and how quickly it moves through it, ultimately shaping the hydrograph.
IS the technique of determining flood hydrograph at a section of river
The peak rainfall is the highest amount of rain in a place on a hydrograph.
The relief of the land significantly influences a storm hydrograph by affecting how quickly water flows into rivers and streams. Steep terrain can lead to rapid runoff, resulting in a sharp rise in discharge on the hydrograph, while flatter areas may allow for slower, more prolonged runoff. Additionally, the presence of features like valleys and hills can create variations in drainage patterns, further impacting the timing and shape of the hydrograph. Overall, the topography plays a crucial role in determining the response of a drainage basin to storm events.
Total Volume of rainfall for that storm event
A stage hydrograph is a graphical representation that illustrates the relationship between water stage (the height of the water surface) and time at a specific location, typically along a river or stream. It displays variations in water levels due to factors such as precipitation, snowmelt, and upstream flow. The hydrograph helps hydrologists and water resource managers analyze flood events, assess river health, and manage water resources effectively.