Questions tagged [hydrology]

The study of the occurrence, distribution, movement, and properties of the waters of the earth an their relationship with the environment within each phase of the hydrologic cycle.

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Is there a method to determine the runoff for arid areas in developing countries?

Note: this question was totally rephrased and expanded on, addressing the comments and questions posed to the first version. The de-facto standard source for runoff calculations in South Africa is ...
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Engineering in Kazakhstan and Rainfall Intensity

We are about to commence a large project in Astana, Kazakhstan worth several hundred million dollars. The design of Stormwater quantity, quality, and hydrology will be a large component of our works, ...
1 vote
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Estimating circular pipe flow velocity through a known elevation profile and known length with a known initial pressure and flow velocity

I have a known elevation profile spanning the length of my pipe (~600 meters). An elevation value is given for every five meters of pipe. At the beginning of the pipe, I have a known velocity (1.1 m/s)...
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Computing the velocity of water under reverse flow conditions from storm water drain

I am trying to compute the approximate velocity of water during reverse flow from the outfall location to the street through storm inlets. This is generally seen during what is commonly referred to as ...
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HEC RAS and storm sewer

It is required to simulate the surface runoff in the city on the basis of the DEM and see how well the storm drains are coping. But I do not know how to make a water intake not from the edge of the ...
19 views

How flood risk is determined

If you live in a 1% AEP flood zone, you have a 50.3% chance of being flooded in a typical lifetime (70 years), and a 15.6% chance of being flooded twice in this period. My Solution for 50.3% = 1 - exp(...
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Estimate cycle of the pump per day

I have a pump system that is on for 5 days. For the entire 5 days, there are 3 days that the pump system is able to complete on and off cycle. I want to estimate the cycle of the pump (on/off) per day?...
20 views

Typical Runoff velocity values

I am computing runoff velocities for rainfall falling over an area using St-Venant 1D momentum equation. I wanted to have some idea if my computed velocities are within a reasonable range of what one ...