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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runofftransformation from surface runoff to Sewernetwork

I'm reading a text on hydrologic and hydrodynamic models for sewer systems. The text explains how to get the effective precipitation, the runoffconcentration and a third aspect is the "runoff ...
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123 views

Open Channel flow with pressure losses - flow depth?

In a horizontal channel that feeds off a river, does the head/pressure loss due to friction, turns etc in the channel translate to a drop in the water level between its inlet and outler? If so, could ...
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2 mm accuracy in an affordable water level sensor (pressure transducer) - Does one exist? [closed]

I'm looking to conduct water level monitoring in streams and rivers for water resource engineering purposes. My plan is to use Arduinos and Raspberry Pis in conjunction with a pressure transducer, as ...
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What is the technical name for a water reservoir that retains its contents via vacuum and ambient air pressure?

This is a strange question for me because this is so extremely common, but I have never heard a name to describe exactly what it is. This is commonly used to provide water to animals from a trough or ...
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73 views

What is this structure in a park

It really has no informative signs on it just signs warning not climb or careful with your ball. It is in a Japanese park. I thought it is a water mound with its lots of pipes coming out it for ...
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1answer
549 views

Peak flow calculation using rainfall data

I am trying to use the Curve Number Method to calculate the peak flow over an area. The precipitation is provided in a table, with the first column being the time (hr), second column being the ...
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1answer
302 views

What is the difference (if any) in capacity factors and efficiency between reservoir hydropower and run-of-river power plants?

My question is about differences between reservoir-hydropower and run-of-river power plants. Are run-of-river plants less efficient? what would be an approximate guess of the differences? (assuming ...
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2answers
357 views

Transporting water uphill at the highest efficiency possible?

I have a passing interest in water desalination projects. One of the challenges of desalination is simply moving the water from the ocean to the desalination plant. Typically the plant is built above ...
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1answer
364 views

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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243 views

How much air gap is required in a storm pipe?

I'm studying the design of storm sewers and I had two questions relating to air gaps in storm pipes: According to sources I've come across, flow through storm pipes require an air gap so as to ...
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103 views

Terminology for ponding behind a bridge during a flood

I have read a specific term to describe the process when water pools behind a restriction such as a bridge during a flood. I cannot for the life of me remember what the word was. The term ...
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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, ...
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What is the purpose of these “steps” in rivers?

I have seen a number of structures within rivers, which resemble steps, and which allow the water to cascade down them instead of flowing naturally down the course of the river. Example 1: River ...
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Differences between 2D hydrological modelling programs eg. HECRAS 5.0 (2D), TUFLOW, MIKE Flood

Just wondering what the difference is between 2D flood modelling programs. I am primarily considering whether HECRAS 5.0 (2D - currently in Beta) would be an acceptable alternative for simple 2D flood ...
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Determining RTK parameters for runoff analysis

I am examining a watershed and determining runoff using the RTK method. I basically use a 'guess and check the hydrograph' method right now. I've seen calibrators that use a mutation and convergence ...