SLUDGE APPLICATION EFFECTS ON RUNOFF, INFILTRATION, AND WATER QUALITY1
作者:
A. C. Bruggeman,
S. Mostaghimi,
期刊:
JAWRA Journal of the American Water Resources Association
(WILEY Available online 1993)
卷期:
Volume 29,
issue 1
页码: 15-26
ISSN:1093-474X
年代: 1993
DOI:10.1111/j.1752-1688.1993.tb01501.x
出版商: Blackwell Publishing Ltd
关键词: sludge;land application;infiltration;runoff;nutrients;water quality
数据来源: WILEY
摘要:
ABSTRACT:Land application of sewage sludge requires careful monitoring because of its potential for contamination of surface water and ground water. A rainfall simulator was used the investigate the effects of freshly applied sludge on infiltration, and on runoff of sediment and nutrients from agricultural crop lands. Rain was applied to 16 experimental field plots. A three‐run sequence was used to simulate different initial moisture conditions. Runoff, sediment, and nutrient losses were monitored at the base of each plot during the simulated rainfall events. Sludge was surface applied and incorporated at conventionally‐tilled plots and surface applied at no‐till plots, at rates of 0, 75, 150 kg‐N/ha. Steady‐state infiltrability increased as a result of sludge application, although the no‐till practice was more effective in increasing the infiltrability than the sludge application. No‐till practices greatly reduced runoff, sediment, and nutrient losses from the sludge treated plots, relative to the conventional tillage practices. Incorporation of the sludge was effective in reducing nutrient yields at the conventionally‐tilled plots. This effect was more pronounced during the third rainstorm, with wet initial conditions. Peak loadings of nutrients appeared during the rainstorm with wet ini
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