100-NR-2 Apatite Treatability Test: Fall 2010 Tracer Infiltration Test (White Paper)

doi:10.2172/1023204

GSTDTAP > 地球科学

DOI	10.2172/1023204
报告编号	PNNL-20322
来源ID	OSTI ID: 1023204
	100-NR-2 Apatite Treatability Test: Fall 2010 Tracer Infiltration Test (White Paper)
	Robertson, A.W.; Ghil, M.; Kravtsov, K.; Smyth, P.J.
	2011-04-14
出版年	2011
语种	英语
国家	美国
领域	地球科学
英文摘要	The primary objectives of the tracer infiltration test were to 1) determine whether field-scale hydraulic properties for the compacted roadbed materials and underlying Hanford fm. sediments comprising the zone of water table fluctuation beneath the site are consistent with estimates based laboratory-scale measurements on core samples and 2) characterize wetting front advancement and distribution of soil moisture achieved for the selected application rate. These primary objectives were met. The test successfully demonstrated that 1) the remaining 2 to 3 ft of compacted roadbed material below the infiltration gallery does not limit infiltration rates to levels that would be expected to eliminate near surface application as a viable amendment delivery approach and 2) the combined aqueous and geophysical monitoring approaches employed at this site, with some operational adjustments based on lessons learned, provides an effective means of assessing wetting front advancement and the distribution of soil moisture achieved for a given solution application. Reasonably good agreement between predicted and observed tracer and moisture front advancement rates was observed. During the first tracer infiltration test, which used a solution application rate of 0.7 cm/hr, tracer arrivals were observed at the water table (10 to 12 ft below the bottom of the infiltration gallery) after approximately 5 days, for an advancement rate of approximately 2 ft/day. This advancement rate is generally consistent with pre-test modeling results that predicted tracer arrival at the water table after approximately 5 days (see Figure 8, bottom left panel). This agreement indicates that hydraulic property values specified in the model for the compacted roadbed materials and underlying Hanford formation sediments, which were based on laboratory-scale measurements, are reasonable estimates of actual field-scale conditions. Additional work is needed to develop a working relationship between resistivity change and the associated change in moisture content so that 4D images of moisture content change can be generated. Results from this field test will be available for any future Ca-citrate-PO4 amendment infiltration tests, which would be designed to evaluate the efficacy of using near surface application of amendments to form apatite mineral phases in the upper portion of the zone of water table fluctuation.
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来源平台	US Department of Energy (DOE)
引用统计
文献类型	科技报告
条目标识符	http://119.78.100.173/C666/handle/2XK7JSWQ/5125
专题	地球科学
推荐引用方式 GB/T 7714	Robertson, A.W.,Ghil, M.,Kravtsov, K.,et al. 100-NR-2 Apatite Treatability Test: Fall 2010 Tracer Infiltration Test (White Paper),2011.