干旱区生态环境知识资源中心(Arid): Measurement of water potential in low-level waste management. [Shallow Land Burial]

Arid

DOI	10.2172/7066220
报告编号	PNL-4388
来源ID	OSTI_ID: 7066220
	Measurement of water potential in low-level waste management. [Shallow Land Burial]
	Jones, T. L.; Gee, G. W.; Kirkham, R. R.; Gibson, D. D.
英文摘要	The measurement of soil water is important to the shallow land burial of low-level waste. Soil water flow is the principle mechanism of radionuclide transport, allows the establishment of stabilizing vegetation and also governs the dissolution and release rates of the waste. This report focuses on the measurement of soil water potential and provides an evaluation of several field instruments that are available for use to monitor waste burial sites located in arid region soils. The theoretical concept of water potential is introduced and its relationship to water content and soil water flow is discussed. Next, four major areas of soils research are presented in terms of their dependence on the water potential concept. There are four basic types of sensors used to measure soil water potential. These are: (1) tensiometers; (2) soil psychrometers; (3) electrical resistance blocks; and (4) heat dissipation probes. Tensiometers are designed to measure the soil water potential directly by measuring the soil water pressure. Monitoring efforts at burial sites require measurements of soil water over long time periods. They also require measurements at key locations such as waste-soil interfaces and within any barrier system installed. Electrical resistance blocks are well suited for these types of measurements. The measurement of soil water potential can be a difficult task. There are several sensors commercially available; however, each has its own limitations. It is important to carefully select the appropriate sensor for the job. The accuracy, range, calibration, and stability of the sensor must be carefully considered. This study suggests that for waste management activities, the choice of sensor will be the tensiometer for precise soil characterization studies and the electrical resistance block for long term monitoring programs. (DMC)
出版年	1982
报告类型	Technical Report
语种	英语
国家	美国
来源学科分类	12 MANAGEMENT OF RADIOACTIVE AND NON-RADIOACTIVE WASTES FROM NUCLEAR FACILITIES ; 54 ENVIRONMENTAL SCIENCES ; MOISTURE GAGES ; COMPARATIVE EVALUATIONS ; RADIOACTIVE WASTE DISPOSAL ; UNDERGROUND DISPOSAL ; SOILS ; MOISTURE ; ELECTRIC CONDUCTIVITY ; LOW-LEVEL RADIOACTIVE WASTES ; MEASURING METHODS ; MONITORING ; RADIONUCLIDE MIGRATION ; STABILIZATION ; TENSIOMETERS ; ELECTRICAL PROPERTIES ; ENVIRONMENTAL TRANSPORT ; MANAGEMENT ; MASS TRANSFER ; MATERIALS ; MEASURING INSTRUMENTS ; PHYSICAL PROPERTIES ; RADIOACTIVE MATERIALS ; RADIOACTIVE WASTES ; WASTE DISPOSAL ; WASTE MANAGEMENT ; WASTES 052002* -- Nuclear Fuels-- Waste Disposal & Storage ; 510100 -- Environment, Terrestrial-- Basic Studies-- (-1989)
URL	http://www.osti.gov/scitech/servlets/purl/7066220
资源类型	科技报告
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/263333
推荐引用方式 GB/T 7714	Jones, T. L.,Gee, G. W.,Kirkham, R. R.,et al. Measurement of water potential in low-level waste management. [Shallow Land Burial],1982.