Answer :
A hydrograph is a graph that shows the stream flow over time. The inflow hydrograph of the given question is given below.
What is a graph?
In discrete mathematics, more specifically in graph theory, a graph is a structure that amounts to a set of objects in which some pairs of the objects are conceptually "related."
The objects correspond to mathematical abstractions known as vertices (also known as nodes or points), and each of the related pairs of vertices is known as an edge (also called link or line).
In diagrammatic form, a graph is typically represented as a collection of dots or circles for the vertices and lines or curves for the edges. In discrete mathematics, graphs are one of the topics of study.
Inflow and outflow hydrograph through the reservoir using the storage indication method (see the attachment).
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