6.16. jules_water_resources.nml

This file sets options for water resource modelling. It contains a single namelist called JULES_WATER_RESOURCES.

Warning

The water resource code in JULES is still in development. It should only be used by the developers.

6.16.1. JULES_WATER_RESOURCES namelist members

JULES_WATER_RESOURCES::l_water_resources
Type:logical
Default:F

Switch to enable modelling of water resources.

TRUE
Water resources are modelled. This also requires that river routing is selected (l_rivers = TRUE).
FALSE
No water resources. In this case no further values from this namelist are required.
JULES_WATER_RESOURCES::nstep_water_res
Type:integer
Permitted:> 0
Default:none

The number of model timesteps per water resource timestep. (The main model timestep is given by timestep_len.)

For example, nstep_water_res = 12 means that demands for water will be accumulated over 12 model timesteps before the water resource code is called on the 12th timestep.

The water resource and river routing models must be in synchrony (i.e. be called on the same timesteps).

Switches that control which water sectors are considered.

JULES_WATER_RESOURCES::l_water_domestic
Type:logical
Default:F

Switch for modelling of water for domestic use.

TRUE
Consider demand for water for domestic use. This requires that the domestic demand is prescribed as an input to the model (see prescribed_data.nml).
FALSE
Do not consider domestic demand.
JULES_WATER_RESOURCES::l_water_environment
Type:logical
Default:F

Switch for modelling of water for environmental flow requirements.

TRUE
Consider demand for water for environmental flows.
FALSE
Do not consider environmental demand.
JULES_WATER_RESOURCES::l_water_industry
Type:logical
Default:F

Switch for modelling of water for industrial use. This requires that the industrial demand is prescribed as an input to the model (see prescribed_data.nml).

TRUE
Consider demand for water for industrial use.
FALSE
Do not consider industrial demand.
JULES_WATER_RESOURCES::l_water_irrigation
Type:logical
Default:F

Switch for modelling of water for irrigation.

TRUE
Consider demand for water for irrigation. This must be used with l_irrig_dmd = TRUE (to activate the inclusion of irrigation in other aspects of the model) and l_irrig_limit = FALSE (to avoid triggering an alternative approach to calculating the water available for irrigation).
FALSE
Do not consider irrigation demand.
JULES_WATER_RESOURCES::l_water_livestock
Type:logical
Default:F

Switch for modelling of water for livestock.

TRUE
Consider demand for water for livestock. This requires that the livestock demand is prescribed as an input to the model (see prescribed_data.nml).
FALSE
Do not consider livestock demand.
JULES_WATER_RESOURCES::l_water_transfers
Type:logical
Default:F

Switch for modelling of water for transfers.

TRUE
Consider demand for water for transfers. This requires that the demand for transfers is prescribed as an input to the model (see prescribed_data.nml).
FALSE
Do not consider transfers.

Switches that control prioritisation of demands.

JULES_WATER_RESOURCES::l_prioritise
Type:logical
Default:F

Switch controlling prioritisation of demands.

TRUE
Rank demands from sectors in priority order.
FALSE
No prioritisation. No further items from this group are required.
JULES_WATER_RESOURCES::priority
Type:character
Default:none

A list of water sector names, in order of decreasing priority - see the table below for valid names. Only used if l_prioritise = TRUE. All active sectors (as selected by switches such as l_water_domestic) must be represented in this list. The same prioritisation is used for all points in the domain.

Name Description
dom Domestic use
env Environmental flows
ind Industrial use
irr Irrigation
liv Livestock use
tra Water transfers
JULES_WATER_RESOURCES::nr_gwater_model
Type:integer
Permitted:0,1,2
Default:none

Choice for the model of non-renewable groundwater. Non-renewable groundwater is water that is not otherwise explicitly included in the model. It is an idealised, infinite source of water which is typically intended to allow consideration of pumping of grounwater from deep reserves that are difficult to quantify.

Possible values are:

  1. No non-renewable groundwater is considered.
  2. Non-renewable groundwater is used as a last resort, when no other sources of water are available.
  3. Non-renewable groundwater is used as as ‘part of the mix’, in conjunction with other sources of water.
JULES_WATER_RESOURCES::rf_domestic
Type:real
Permitted:0-1
Default:none

The fraction of water that is returned after abstraction for domestic use (via sewage systems etc.). Only used if l_water_domestic = TRUE.

JULES_WATER_RESOURCES::rf_industry
Type:real
Permitted:0-1
Default:none

The fraction of water that is returned after abstraction for industrial use. Only used if l_water_industry = TRUE.

JULES_WATER_RESOURCES::rf_livestock
Type:real
Permitted:0-1
Default:none

The fraction of water that is returned after abstraction for livestock. Only used if l_water_livestock = TRUE.