====== Water map operations ======

===== Flooding the water map =====

To flood the water map, select the '//Operations->Water map->Flood wizard...//' menu option. This wil open the //water flooding// wizard, shown below:

{{ l3dt:userguide:wizards:waterflood.png }}

The controls are as follows:
  * //Clear existing WM// will delete any existing water map prior to flooding. 
  * //Flood water plane// will flood a uniform 'plane' of water at the set //water level//, with a //water type// of either sea or lakes. 
  * //Auto-flood seas// will flood seas wherever any 'sea seed' flags are found in the [[l3dt:reference:maps:dm|design map]]. 
  * //Auto-flood lakes// will flood lakes wherever any 'lakes' flags are found in the [[l3dt:reference:maps:dm|design map]]. 
  * //Flood water-table// will activate the [[#flooding_the_water-table|water-table modelling]] wizard pane, which will allow you to [[l3dt:algorithms:wm#water_table_and_salinity_mapping|flood the water table]].

To see a typical water map, [[l3dt:reference:maps:wm|go here]].



===== Auto-flooding sea =====

L3DT will automatically flood seas wherever the [[l3dt:reference:maps:dm|design map]] has a 'sea seed' special land type. This may be done either by using the //auto flood sea// option in the [[#Flooding the water map|water-flooding wizard]], or by using the '//Operations→Water map->Auto flood sea//' option in the menu. 

<note>
You can also [[l3dt:userguide:tools:wm_flood|flood seas manually]].
</note>





===== Auto-flooding lakes =====

Similar to [[#auto-flooding sea]], L3DT can automatically flood lakes wherever the [[l3dt:reference:maps:dm|design map]] has a non-zero 'lakes' parameter. This may be done either by using the //auto flood lakes// option in the [[#Flooding the water map|water-flooding wizard]], or by using the '//Operations->Water map->Auto flood lakes//' option in the menu. 

If you are unhappy with the lakes you may delete individual lakes using the '[[l3dt:userguide:tools:wm_delete|delete water body]]' mouse mode, or clear the whole lot by selecting the '//File->Close->Water map//' menu option.

<note tip>
For the 'Auto-flood lakes' option to have any effect, you must set the 'lakes' parameter in the design map parameters wizard to a non-zero number, and/or edit the design map to add non-zero values for the lake field.
</note>

<note>
You can also [[l3dt:userguide:tools:wm_flood|flood lakes manually]].
</note>

=====Flooding the water-table =====

The subterranean water table is required for assigning the land types in the attributes map (see the [[l3dt:algorithms:cli:am_algo|algorithms page]] for details). The water table is calculated via the //water table modelling// wizard, shown below. This window is opened by enabling the //calculate water-table// option in the [[#flooding_the_water_map|water flooding]] wizard, or by selecting the '//Operations->Water map->Flood water-table//' option from the menu.

{{ l3dt:userguide:wizards:wtable.png }}

This window exposes the base-level modelling parameters of the water map calculation, which are described - poorly - on the [[l3dt:algorithms:wm#water_table_and_salinity_mapping|algorithms page]]. The default parameters were entirely arbitrary (the old 'what looks right' factor), so if you want to change the settings please feel free.

<note>
You can change the [[l3dt:userguide:view:schemes:wm|water map display settings]] to show or hide the water table, salinity, heightfield contours, etc. 
</note>

===== Flooding water manually =====

Please refer to the [[l3dt:userguide:tools:wm_flood|water flooding tool]] page.

===== Deleting water bodies =====

Please refer to the [[l3dt:userguide:tools:wm_delete|delete water body tool]] page.