Significance analysis of the leachate level in a solid waste landfill in a coastal zone using total water balance and slope stability alternatives
- Korea Advanced Institute of Science & Technology, Taejon (Korea, Republic of)
The K site near Seoul began landfilling in 1992. The landfilled wastes include municipal solid waste (66.4%), construction residues (20.4%), water and wastewater sludges (trace levels), and hazardous waste (trace levels). The water content of the municipal solid waste is very high (47.3%); as a result, the leachate level (average E.L.) of the landfill, the design value of which is 7.0 m, was measured at 10.3 m in January 1995 and is increasing. The increase of leachate level in the landfill site causes a problem with slope stability. The leachate level at each disposal stage divided by the intermediate cover layer was calculated with the HELP (Hydrologic Evaluation of Landfill Performance) model and calibrated with the data measured from February 1993 to June 1995. Also, the hydraulic conductivities of the waste layer and the intermediate cover layer in each stage were calibrated continuously with HELP model analysis. To verify these results, the total water balance in the landfill site was calculated using the infiltration rate calculated from HELP modeling. The leachate level was E.L. 10.0 m, which was close to the measured leachate level. To estimate the change of the leachate level in the future, the total water balances with different leachate discharge rates of 3,000, 3,500, and 5,000 m{sup 3}/day were analyzed. When the leachate discharge rate was 5,000 ton/day and the initial water content was decreased below 25%, the average leachate level was 10.8 m. This result satisfies the safety factor requirements (=1.3) for landfill slope stability. 4 refs., 8 figs., 1 tab.
- Research Organization:
- Argonne National Lab. (ANL), Argonne, IL (United States)
- OSTI ID:
- 567704
- Report Number(s):
- CONF-9611157-; ON: DE97009015; TRN: 98:000722-0019
- Resource Relation:
- Conference: 1996 Pacific Basin conference on hazardous waste, Kuala Lumpur (Malaysia), 4-8 Nov 1996; Other Information: PBD: [1996]; Related Information: Is Part Of Pacific Basin conference on hazardous waste: Proceedings; PB: 706 p.
- Country of Publication:
- United States
- Language:
- English
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