seperate systems
I think the infiltration of the rain water into the city sanitary system is NOT coming from the storm water system. The storm water system starts at the curbs and gutters and flows down to the retention ponds and then on to the creeks. The purpose of the ponds is to not over load the creeks during heavy rains.
The sanitary system has problems with roots and cracks in the tiles and lines leading to the sewer plant. I believe I have seen the city repairing these lines. That water is ground water and in most cases it has not entered the storm sewer system. It comes from our yards and in some cases I understand some manholes covers in the city get covered with rain water (floods) during heavy rains.
Mr. Sauer is correct in the high density housing does add more impervious surface area and causes more run off. However that run off doesn't normally make it to the sewer plant.
The other claims he made toward the issue of high density housing I do not know where he picked that up. Normally lower density areas have huge homes on one acre tracts or larger and you have a family of three using a lot more land than those in the city than in a high density condo development as an example. Most environmentalist would prefer the condo development to preserve land use. I would say when you figure in the cost to heat these larger living units and the longer drives to work I think the ''more pollution'' argument may be bogus.
I think the infiltration of the rain water into the city sanitary system is NOT coming from the storm water system. The storm water system starts at the curbs and gutters and flows down to the retention ponds and then on to the creeks. The purpose of the ponds is to not over load the creeks during heavy rains.
The sanitary system has problems with roots and cracks in the tiles and lines leading to the sewer plant. I believe I have seen the city repairing these lines. That water is ground water and in most cases it has not entered the storm sewer system. It comes from our yards and in some cases I understand some manholes covers in the city get covered with rain water (floods) during heavy rains.
Mr. Sauer is correct in the high density housing does add more impervious surface area and causes more run off. However that run off doesn't normally make it to the sewer plant.
The other claims he made toward the issue of high density housing I do not know where he picked that up. Normally lower density areas have huge homes on one acre tracts or larger and you have a family of three using a lot more land than those in the city than in a high density condo development as an example. Most environmentalist would prefer the condo development to preserve land use. I would say when you figure in the cost to heat these larger living units and the longer drives to work I think the ''more pollution'' argument may be bogus.