The Purpose of a Drainage Ditch was the bottom of the trenches where the soil turned very muddy. It held the muddy water, rubbish and occasionally excretement and stopped the soldiers from stepping on it with Duckboards.
Not if it is a drainage ditch that affects anyone else but you, or if it is a designated wetland area.
you can drink it, but it depend if it is clear.
A steel grate cover for a drainage ditch can be found at an industrial supply store. They are generally purchased by contractors for maintenance and installation jobs.
a drainage ditch, and aquaduct, i think.
7.7 hours
That's highly unlikely unless the well is very shallow.
You can see evidence of erosion in San Angelo along the Concho River, where exposed rock formations and sediment deposits indicate the effects of water erosion. Additionally, along Lake Nasworthy, erosion can be observed along the shoreline where sediment is being carried away by water flow.
drainage
One word that fits this definition is ditch.
It is a moat or defensive ditch in a fortification, usually filled with water
The word "ditch" is commonly translated to "vala" or "canal" in Portuguese. It refers to a narrow trench or channel dug in the ground for drainage or irrigation purposes.