Urban Groundwater model

Welcome to the Urban Groundwater model,UGM-1 . UGM-1 is a lumped (1-dimensional) groundwater model at monthly timestep, that users can run online, from the Bangalore Urban Metabolism Project (BUMP) web portal.

This is a model for creating awareness and teaching about urban growth, groundwater use and its impacts on groundwater levels. It is an exploratory tool to answer what-if questions. It is not meant to give prescriptive answers.

A lumped (1-d) model is basically a vertical water balance model. Assume it is a city. Inputs are for an entire city. Outputs are for an entire city. The numerical model description is available here: (URL) The default inputs for UGM-1 are based on Bangalore city (Bengaluru), India; however, users can change the inputs and hydrogeological parameters to explore a different city's locale.

Inputs:

1. Water supplied at source (WS) (default, 1400 MLD or million litres per day)
2. Leakage factor (assumed going to gw recharge)
3. Other Water Delivered (million Litres per day)

Hydrogeological parameters

Specific yield Quantifies the volume of water released from aquifer storage for a unit drop in groundwater head Recharge factor Fraction of rainfall that becomes groundwater recharge Initial groundwater head Groundwater head below which baseflow does not occur Baseflow parameter for regional outflow

Forcings

Rainfall Population City population at start of model run Per capita demand This represents the per capita demand across ALL sectors, domestic and non-domestic. Growth rate Population annual % growth rate Public water supply Total water supplied at distribution points Leakage factor Leakage from water distribution pipes (%) Public groundwater supply Groundwater pumped by utility