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User Forum

All Topics | Topic "River Simulation"
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Author Message
Mohamed Abbas

Subject: River Simulation   
Posted: 7/15/2014 Viewed: 12194 times
Hi, I am doing a research in the Blue Nile river basin from Lake Tana in Ethiopia till Khartoum city in Sudan. I tried to simulate the flow at Eldeim station (gauge station) by choicing Inflow to Area - River - Streaflow Relative to Gauge (Absolute), after running the model. knowing that there are 13 triebutaries above this station. where I add headflow for each of these tributaries.
When I add the headflow for the first one (above lake Tana reservoir) this will remain till Eldeim station, whithout adding the other tributaries (12) for the simulation. Please advice
Devaraj de Condappa

Subject: Re: River Simulation   
Posted: 7/16/2014 Viewed: 12160 times
Dear Mohamed,

I am sorry, I don't understand your question. Would you mind to reformulate it?

Thanks!
Mohamed Abbas

Subject: Re: River Simulation   
Posted: 7/20/2014 Viewed: 12145 times
Dear, Devaraj
Many thanks for willing to help .. really I edit headflow data for each tributaries (i.e. 13 tributaries)all these tributaries join the main river at different locations including the first tributaries comprising the main river, But when I click a right click on the main river (after connection of all tributaries) and select edit data headflow I noticed the file was not the sum of all these tributaries but was only the first one at the head of the river that I edit it. Am I right, or there was an error.
Devaraj de Condappa

Subject: Re: River Simulation   
Posted: 7/20/2014 Viewed: 12138 times
Dear Mohamed,

Ok now I understand your question.

What you are seeing is normal. Headflow is the flow at the head of the river. So if you are looking at the main tributary the headflow is indeed the flow at the head (= beginning) of the river, the one you entered initially and WEAP does not change it.

What you are looking for is actually not the headflow but the flow downstream, after all the tributaries have joined the main river. This flow you can only view it in the Results view (ie WEAP has to run), under Supply and Resources > River > Streamflow. Make sure you select the result for the main river and select the node after the last tributary has joined the main river.

Kind regards,
Mohamed Abbas

Subject: Re: River Simulation   
Posted: 7/21/2014 Viewed: 12131 times
Dear, Devaraj

Thank you very much for your assistances.

Yours,

Mohamed

Anum Dar

Subject: Re: River Simulation   
Posted: 7/24/2014 Viewed: 12049 times
Hi Devaraj,

I read your reply to Mohammed. I have a question, perhaps you can also help me. I have modelled a river in Alberta along with its tributaries and have also added the demand sites. Now I can see the results of water demand, supply requirement, unmet demand, coverage etc. but how can I tell anyone that this much amount of water is there in the river after satisfying all the demand sites? Is there an option in results to see the remaining water available in the river?

Anum
Devaraj de Condappa

Subject: Re: River Simulation   
Posted: 7/24/2014 Viewed: 12045 times
Dear Anum,

Yes you can see this with the same Streamflow results I told Mohamed to look at. On your schematic, look at the name of the nodes on the river that WEAP creates for each transmission link from the river to the demands. Then in the Streamflow results search for these nodes and there you can view the flow before and after these nodes.

Kind regards,
Anum Dar

Subject: Re: River Simulation   
Posted: 7/25/2014 Viewed: 12018 times
Hi Devaraj,

Thanks for your reply. I have one more question: I have a demand site with the name "Petroleum" and it has sub-branches as shown below:

Petroleum
1.Surface Mining
2.Insitu
2.1 Atha
2.2 Peace
2.3 Cold Lake

Now I want to provide water to these sub-branches by three different rivers. For more simplicity, I would say that I want to provide water to sub-branch "surface mining" and "atha" by Athabasca river, to sub-branch "peace" by peace river and to sub-branch "cold lake" by cold lake. Is there any option in WEAP to do it? I mean by giving percentages of how much the total annual activity of a demand site is to be met by which river?

Anum


Devaraj de Condappa

Subject: Re: River Simulation   
Posted: 7/26/2014 Viewed: 12014 times
Dear Anum,

Yes there is a way:

1. Connect your Petroleum water demand to all the water supply sources (Athabasca river, peace river and cold lake).

2. Right click on the transmission link from Athabasca river and select Edit Data > Maximum Flow Percent of Demand. Entere here the % you want and do the same for all the transmission links.

3. If you are quite familiar with WEAP, you can be fancy with the following options:
* you can enter a monthly % as a function of the sub-branch (i.e., surface mining, different in-situ categories);
* I would advise you to use the Expression Builder and use Branches to ask WEAP to use the values you entered for the 'Annual Activity level' and the 'Monthly Variation' of the sub-branches of the Petroleum water demand. Like this you just need to enter values in the sub-branches of Petroleum water demand and it will automatically reflect in the transmission links (e.g., you would consider scenarios where you are changing the Petroleum water demand);
* in any case, don't forget to check that at every time step the % you entered for Maximum Flow Percent of Demand sums to 100% accross all the transmission links.

I hope my explanations are clear enough. Please tell me if not the case.

Kind regards,
Anum Dar

Subject: Re: River Simulation   
Posted: 7/29/2014 Viewed: 11983 times
Hi Devaraj,

I tried doing it in the way you told but was not successful. I have some confusion. The sector is:

Petroleum Sector for Athabasca
- Bitumen Extraction
- Surface Mining
- In-Situ
- Gas/Chemical Plants

Petroleum Sector for Peace
- Petrochemical Plants

Let's say for insitu, I want the water from the two river sources: Athabasca and Peace river. If I will use "Maximum Flow Percent of Demand" then do I have to calculate the percentage of each sub-sector (bitumen extraction and then its sub-sectors: surface mining and insitu and also Gas/Chemical Plants) in the petroluem sector for Athabasca and then put that percentage in the Maximum Flow Percent of Demand?? If yes, how will I calculate the percentage of each as it is annual acitvity dependent which keeps on changing every year?

I am not good with expression builder so I have no idea of how to utilize that in my case. Need your assistance.

Anum

Devaraj de Condappa

Subject: Re: River Simulation   
Posted: 7/30/2014 Viewed: 11977 times
Maybe in your case it is better that you create more than just one main water demand. I would advise you to do it based on the geographical location of each sub-category (e.g., one water demand for Bitumen Extraction, one for Surface Mining etc).

Kind regards,
Topic "River Simulation"