Microorganisms in Urban Stormwater /

Mode of access: Internet.

Draft documents on the subject of stormwater management /

Cover title: Stormwater quality summary.

4Rs : recycling lessons & projects with an index to the Illinois Learning Standards : reduce, reuse, recycle, rebuy /

"The 4Rs Recycling Lessons and Projects with an Index to the Illinois Learning Standards has been produced through a cooperative effort between the Illinois Department of Commerce and Economic Opportunity (DCEO) and University of Illinois Extension. This publication is dedicated to increasing environmental awareness among Illinois students and achieving long-term behavior changes to ensure the wise use of our natural resources. The lesson plans and activities are designed for grades K-8."--Prelim. page.

4Rs newsletter : reduce, reuse, recycle, re-buy /

Title from caption.

Alkaline noncyanide zinc plating with reuse of recovered chemicals /

"Cooperative agreement number CR-815829."

Illinois success stories in waste reduction : do the right thing! : reduce, reuse, recycle.

Project manager : Holt, Ross & Yulish, Inc.

Oil audit and reuse manual for the industrial plant /

Mode of access: Internet.

Reduce, reuse, recycle : Illinois Recycling Grants Program : facts.

Cover title.

Stormwater management /

"December, 1982."

Textbook reuse and recycling guide.

"ILENR/RR-92/12."

Textbook reuse and recycling guide.

"ILENR/RR-92/12."

The three R's, reduce, reuse, recycle : a newsletter for elementary teachers.

"ILENR/RR-90/02"--Cover.

Urban stormwater management : final report.

"Initiated November 1976 as part of the statewide 208 Water Quality Management Planning Program."

Control of pollution from animal feedlots and reuse of animal wastes : fourteenth report together with supplemental and dissenting views /

At head of title : 93d Cong., 2d sess. House report no. 93-1012.

Modelling of different measures for improving removal in a stormwater pond

The effect of retrofitting an existing pond on removal efficiency and hydraulic performance was modelled using the commercial software Mike21 and compartmental modelling. The Mike21 model had previously been calibrated on the studied pond. Installation of baffles, the addition of culverts under a causeway and removal of an existing island were all studied as possible improvement measures in the pond. The subsequent effect on hydraulic performance and removal of. suspended solids was then evaluated. Copper, cadmium, BOD, nitrogen and phosphorus removal were,also investigated for that specific improvement measure showing the best results. Outcomes of this study reveal that all measures increase the removal efficiency of suspended solids. The hydraulic efficiency is improved for all cases, except for the case where the island is removed. Compartmental modelling was also used to evaluate hydraulic performance and facilitated a better understanding of the way each of the different measures affected the flow pattern and performance. It was concluded that the installation of baffles is the best of the studied measures resulting in a reduction in the annual load on the receiving lake by approximately 8,000 kg of suspended solids (25% reduction of the annual load), 2 kg of copper (10% reduction of the annual load) and 600 kg of BOD (10% reduction of the annual load).