Botswana Training Workshop June 2024
  • Tutorial 3: Planning for water resilience in Botswana.
    • Introduction
    • Botswana National Water Resource System Model (Training version)
    • Baseline system performance
    • Activating the Chobe-Zambezi Transfer
    • Implementing the Walvis Bay transfer
    • Implementing the Lesotho Highlands Transfer
    • Reducing Non-Revenue Water
      • Calculating domestic demand within the model
      • Implementing a NRW demand loss reduction
    • Implementing the Chobe and NRW losses reduction
    • Additional exercises
  • Tutorial 4: Adding new infrastructure in the Botswana national model
    • Adding Mosetse dam
    • Adding a demand
    • Adding a water treatment works with losses
    • Adding a source representing groundwater
    • Additional Exercises
  • Tutorial 5: More advanced modelling
    • Background on Evaporation and Precipitation on Reservoirs
    • Adding reservoir bathymetry (Area)
    • Adding reservoir bathymetry (Level)
    • Adding monthly evaporation and rainfall
  • Tutorial 6: Allocation penalties
    • Exercise 1a Two nodes
    • Exercise 1b Two demands
    • Exercise 1d Minimum Flow Properties
    • Exercise 2a Simple system with reservoir draw downs
    • Exercise 2b Simple system with overflow
  • Tutorial 7: Additional exercises with allocation penalties and control curves
    • Additional exercises using allocation penalties and control rules
    • Exercise to implement demand reductions when reservoirs levels are low
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  1. Tutorial 3: Planning for water resilience in Botswana.
  2. Reducing Non-Revenue Water

Implementing a NRW demand loss reduction

PreviousCalculating domestic demand within the modelNextImplementing the Chobe and NRW losses reduction

Last updated 9 months ago

Each domestic water demand in the Botswana national water resources model is calculated as a product of the:

  • "Gaborone DC baseline": Baseline water demand in 2020

  • "domestic_scn factor": A future uplift factor quantified by an increase in the population and Per Capita Consumption

  • "Gaborone DC NRW factor": Non-revenue water factor

  • "Gaborone&Bokaa saving factor": Demand reductions resulting from water use restrictions imposed due to low reservoir levels (usually no demand reductions are implemented and this value is 1.0)

To model a scenario where NRW demand is reduced:

  1. Clone the Baseline scenario and name the new scenario 'NRW 20%'.

  1. Click on the Parameters tab

  1. Search for the word NRW

Change the Gaborone DC NRW factor to 1.25 as follows:

{
	"type": "ConstantParameter",
	"value": 1.25
}

Do this for the Mochudi DC NRW and Romotswa DC NRW parameters.

  1. Run this scenario and compare the simulated_volume in the Gaborone reservoir in this scnearoi and the Baseline and Chobe scenarios.

The NRW scenario is Green while the Chobe scenario is orange and the Baseline scenario is blue. The NRW20% scenario results in the Gaborone reservoir having slightly more storage than the baseline scenario. However in general the reservoir has less storage than under the Chobe scenario.

Click on the Gaborone DC node and view its simulated_flow. Gaborone still experiences frequent deficits even when NRW is reduced to 20% under this demand scenario.

and click on .