ANALYSIS OF SOLID-WASTE SYSTEMS IN A RURAL SETTING, WITH DISCUSSION AND CLOSURE

THE U. S. FOREST SERVICE IS CURRENTLY UPGRADING THE SOLID- WASTE DISPOSAL METHODS USED IN ITS 153 NATIONAL FORESTS. THE TECHNIQUE CONSISTS OF COLLECTING REFUSE AT CAMPING AND PICNICKING AREAS BY USING TRUCKS. THE TRUCKS THEN HAUL THE SOLID WASTE TO CONVENIENTLY LOCATED SANITARY LANDFILLS WHERE IT IS COMPACTED AND BURIED. PRELIMINARY ANALYSIS OF THIS APPROACH IN A TEST FOREST SHOWED THAT COST SAVINGS OF AS MUCH AS A THIRD ARE POSSIBLE. TO MINIMIZE TOTAL COST, WE HAVE CONSTRUCTED A DETERMINISTIC CREW-SCHEDULING MODEL THAT CONSISTS OF A MIXED INTEGER LINEAR PROGRAMMING FORMULATION. AREAS TO BE SERVICED ARE INTRODUCED AS NODES IN A NETWORK, AND CONNECTIVE ROADS CONSTITUE THE NETWORK LINKS. THE NECESSITY FOR SERVICING ALL CAMP AREAS, THE LIMITED CAPACITY OF TRUCKS, AND THE LIMITED WORKING DAY OF CREWS SERVE AS A SET OF CONSTRAINTS. IN ADDITION, CREWS START AND END THEIR TOURS AT HEADQUARTERS. COSTS ARE ASSOCIATED WITH BOTH THE TOTAL NETWORK COVERAGE AND THE LANDFILL OPERATION. THE VARIABLES UNDER MANAGEMENT CONTROL, SUCH AS CREW SIZE, TRUCK CAPACITY, AND COLLECTION FREQUENCY, ARE TESTED PARAMETRICALLY; I.E., THE OPTIMUM SCHEDULE IS EVALUATED EACH TIME A PARAMETER IS CHANGED. THE PROCEDURE PERMITS AN INTEGRATED REGIONAL PLAN TO BE COMPARED WITH A COLLECTION OF SUBREGIONAL PLANS. /AUTHOR/

• Record URL:
  http://onlinepubs.trb.org/Onlinepubs/hrr/1972/391/391-002.pdf
• Supplemental Notes:
  • Sponsored by Committee on Roadside Maintenance. Distribution, posting, or copying of this PDF is strictly prohibited without written permission of the Transportation Research Board of the National Academy of Sciences. Unless otherwise indicated, all materials in this PDF are copyrighted by the National Academy of Sciences. Copyright © National Academy of Sciences. All rights reserved.
• Authors:
  • Kirby, Malcolm W
  • Hirsch, Ernest
• Discussers:
  • Drake, W B
  • Riebe, Charles F
• Conference:
  • 51st Annual Meeting of the Highway Research Board
  • Location: Washington District of Columbia, United States
  • Date: 1972-1-17 to 1972-1-21
• Publication Date: 1972

Media Info

• Media Type: Digital/other
• Features: References;
• Pagination: pp 10-16
• Monograph Title: Maintenance systems: estimating maintenance costs, solid-waste disposal systems, maintenance station locations, manager training, and equipment management
• Serial:
  • Highway Research Record
  • Issue Number: 391
  • Publisher: Highway Research Board

Subject/Index Terms

• TRT Terms: Camping; Compaction; Forests; Landfills; Linear programming; Maintenance management; Maintenance practices; Mathematical models; Scheduling; Seasons; Solid waste disposal; Solid wastes; Waste disposal
• Uncontrolled Terms: Maintenance costs; Seasonal variations
• Subject Areas: Highways; Maintenance and Preservation;

Filing Info

• Accession Number: 00219002
• Record Type: Publication
• Files: TRIS, TRB
• Created Date: Sep 30 1972 12:00AM