Subject: River Runoff Estimation Posted: 4/1/2016 Viewed: 10816 times
Hi, I want to calculate river runoff.i have river data from 1988 to 2005 and precipitation data that i have 1961 to 2013.i want to calculate river runoff for future scenario like what will be river runoff position in 2050s.i already delineated watershed and catchments for the area, now how to start WEAP.Please guide me.
Ms. Stephanie Galaitsi
Subject: Re: River Runoff Estimation Posted: 4/4/2016 Viewed: 10766 times
Before you can calculate river runoff for the future, you will need to follow these two important steps:
1) Calibrate the river runoff in a historic WEAP model for your basin
2) Decide what the future climatic conditions in your basin will look like
For Step 1, you'll need to model the years when you have available precipitation (and possible others, depending on your catchment methodology) data and streamflow data. It sounds like this is 1988-2005. Make a model for this time period and enter in your precipitation data. Then change the other parameters (you can use PEST to help with this) until your modeled data matches your observed data as closely as possible. You might want to use some statistical parameters like Nash-Sutcliffe to quantify how well you've calibrated. You can compare the modeled and observed streamflow by entering your observed data in a streamflow gauge and looking at the result Supply and Resources/River/Streamflow Relative to Gauge, or by looking at the gauge and the nearest modeled river flow.
Once your model is calibrated with the correct parameters for your catchment variables, you can change the dates of the model to examine the future to 2050. This is where you will need climatic data for that period. You can always start by cycling the historic climatic data. See the video on using the ReadFromFile Wizard for more details about how to do this (www.WEAP21.org/videos).
Dr. Muhammad Abrar Faiz
Subject: Re: River Runoff Estimation Posted: 4/4/2016 Viewed: 10758 times
very thanks Stephanie Galaitsi