Interesting subject. I have a friend who is a horticulturalist and he shed some light on lawn watering recently. His take is that it is better to do a single total soaking once a week rather than a daily soak. The reason being is the grass roots grow to access the water. If you do a total deep soaking the roots will stretch to follow the water as it works it's way towards the aquifer. If you do a typical light daily watering the water never penetrates deeply into the soil and the roots grow horizontally rather than vertically. A deeply rooted lawn will always be healthier and more resistant to dry conditions.
I'm just a homeowner with a brown lawn who doesn't believe in wasting water on grass but it makes sense to me.
I'm just a homeowner with a brown lawn who doesn't believe in wasting water on grass but it makes sense to me.