Talk:Groundwater

message: Hi User:Jarble, I saw your note in to-dos ("Describe the effects of climate change on groundwater resources") and I agree it's a good task and I plan to tackle this in the coming week. Do you have any particular pointers in mind, e.g. also related Wikipedia articles where this is perhaps already included? I'll look at effects of climate change and effects of climate change on the water cycle. We'll have to make sure the same content is not repeated too much on several Wikipedia articles. EMsmile (talk) 13:36, 7 December 2022 (UTC)
replies: text: I updated the to-do list a while ago (in 2019); since then, an article about the effects of climate change on the water cycle has been written. This article describes some of the effects of climate change on groundwater resources. Jarble (talk) 17:49, 7 December 2022 (UTC)
replies: text:  OK, then I have now removed that item from the to do list. I'll do a bit more work to link better to that article. EMsmile (talk) 14:40, 12 December 2022 (UTC)
thread_title: Add effects of climate change on groundwater resources

message: I've removed this section on management issues because it was overly specific and not suitable for a high level overview article on groundwater. Also it was all relying on just one primary source. EMsmile (talk) 14:49, 19 January 2023 (UTC)
thread_title:  Removed content on management issues 

message: Water management agencies, when calculating the "sustainable yield" of aquifer and river water, have often counted the same water twice, once in the aquifer, and once in its connected river. This problem, although understood for centuries, has persisted, partly through inertia within government agencies. In Australia, for example, prior to the statutory reforms initiated by the Council of Australian Governments water reform framework in the 1990s, many Australian states managed groundwater and surface water through separate government agencies, an approach beset by rivalry and poor communication.
In general, the time lags inherent in the dynamic response of groundwater to development have been ignored by water management agencies, decades after scientific understanding of the issue was consolidated. The effects of groundwater overdraft may take decades or centuries to manifest themselves.  The science has been available to make these calculations for decades; however, in general water management agencies often ignore such effects that have longer timeframes. Management agencies need to define and use appropriate timeframes in groundwater planning. This will mean calculating groundwater withdrawal permits based on predicted effects decades, sometimes centuries in the future.
For example, a modelling study investigated a situation where groundwater extraction in an intermontane basin withdrew the entire annual recharge, leaving ‘nothing’ for the natural groundwater-dependent vegetation community. Even when the borefield was situated close to the vegetation, 30% of the original vegetation demand could still be met by the lag inherent in the system after 100 years. By year 500, this had reduced to 0%, signalling complete death of the groundwater-dependent vegetation. EMsmile (talk) 14:49, 19 January 2023 (UTC)
thread_title:  Management issues 

message: Instead of this text I have now added an excerpt from groundwater pollution. That excerpt is more up to date and better written. Also that image with the iron oxide staining didn't say very much so I have removed that as well. EMsmile (talk) 14:59, 19 January 2023 (UTC)
thread_title:  Groundwater pollution content replaced with excerpt 

message: — Assignment last updated by Azadirachta indica (talk) 16:13, 24 February 2023 (UTC)
thread_title: Wiki Education assignment: Plant Ecology Winter 2023