I've just been reading up on these, how easily they could be set up, their importance to wildlife especially from how many insects they support in the muddy margins.
farmwildlife.info
www.wwt.org.uk
Might be possible to set them up in a moderate sized garden.
Temporary ponds and scrapes - Farm Wildlife
Temporary ponds and scrapes Despite their tendency to change between wet and dry, temporary ponds support a vast array of wildlife. Drying out prevents fish from establishing, providing a predator-free environment for tadpoles and many aquatic invertebrates to thrive. What Temporary pools and...
farmwildlife.info
Ditches and scrapes
The blue veins of our land may not look like anything special, but delve a little deeper and you’ll uncover a hidden ecosystem.
www.wwt.org.uk
Might be possible to set them up in a moderate sized garden.