Calibrating SALT: a sampling scheme to improve estimates of suspended sediment yield

Robert B. Thomas

Treesearch

Calibrating SALT: a sampling scheme to improve estimates of suspended sediment yield

Informally Refereed

Authors:

Robert B. Thomas

Year:

1986

Type:

Miscellaneous Publication

Station:

Pacific Southwest Research Station

Source:

In: Monitoring to detect changes in water quality series, proceedings of the Budapest Symposium, July 1986, Budapest, Hungary; International Association of Hydrological Sciences Publication no. 157. Wallingford, UK; 79-88.

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Abstract

Abstract - SALT (Selection At List Time) is a variable probability sampling scheme that provides unbiased estimates of suspended sediment yield and its variance. SALT performs better than standard schemes which are estimate variance. Sampling probabilities are based on a sediment rating function which promotes greater sampling intensity during periods of high sediment yield. When preparing to monitor using SALT, the quality of the existing suspended sediment rating data is an important consideration. SALT variance, based on an intensive data set from a river in northwestern California, showed greater sensitivity to the SALT sample size than to the quality of the calibration set

Keywords

PSW4351, Selection At List Time, SALT, suspended sediment, measurement, probability-based samplin

Citation

Thomas, Robert B. 1986. Calibrating SALT: a sampling scheme to improve estimates of suspended sediment yield. In: Monitoring to detect changes in water quality series, proceedings of the Budapest Symposium, July 1986, Budapest, Hungary; International Association of Hydrological Sciences Publication no. 157. Wallingford, UK; 79-88.