IMPROVING OF SEDIMENT RATING CURVE USING MINIMUM VARIANCE UNBIASED ESTIMATOR

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VARVANI J.; NAJAFI NEJAD A.; MIRMOEINI KARAHROUDI A.

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Journal Paper

Paper Information

Journal: Journal of Agricultural Sciences and Natural Resources Year:2008 | Volume:15 | Issue:1 (SPECIAL ISSUE ON NATURAL RESOURCES) Page(s): 150-161

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Information Journal Paper

Title

IMPROVING OF SEDIMENT RATING CURVE USING MINIMUM VARIANCE UNBIASED ESTIMATOR

Author(s)

VARVANI J. | NAJAFI NEJAD A. | MIRMOEINI KARAHROUDI A. | Issue Writer Certificate

Keywords

SEDIMENT RATING CURVEQ2

MVUEQ3

LOGARITHMIC TRANSFORMATIONQ3

SUSPENDED LOADQ2

HYDROMETRIC STATIONQ3

Abstract

Complex and variable nature of the river sediment yield caused many problems in prediction of the long-term sediment yield and input into the reservoirs .SEDIMENT RATING CURVEs generally used to estimate the suspended sediment load of the river and drainage basin. Since the regression equations of the SEDIMENT RATING CURVEs obtained by logarithmic retransformation and little independent variable include in this equation they also overestimate or underestimate the true load of the rivers. In this research in order to improve and develop sediment yield estimation methods the estimates of 10 kind of SEDIMENT RATING CURVEs were compared with actual loads of 5 stations in different climate zones of the country by using accuracy and precision index .the results show that in estimating long term mean load of the selected periods the Linear-MVUE SEDIMENT RATING CURVE has relatively high accuracy and precision comparing other kinds of SEDIMENT RATING CURVEs. In average, the accuracy index of this method is about 1.23 that is reasonable among other methods. Since this kind of sediment, rating curve uses different data characteristics and information it could be recommend for application in sediment yield estimation within acceptable confidence limits.

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APA: Copy

VARVANI, J., NAJAFI NEJAD, A., & MIRMOEINI KARAHROUDI, A.. (2008). IMPROVING OF SEDIMENT RATING CURVE USING MINIMUM VARIANCE UNBIASED ESTIMATOR. JOURNAL OF AGRICULTURAL SCIENCES AND NATURAL RESOURCES, 15(1 (SPECIAL ISSUE ON NATURAL RESOURCES)), 150-161. SID. https://sid.ir/paper/9296/en

Vancouver: Copy

VARVANI J., NAJAFI NEJAD A., MIRMOEINI KARAHROUDI A.. IMPROVING OF SEDIMENT RATING CURVE USING MINIMUM VARIANCE UNBIASED ESTIMATOR. JOURNAL OF AGRICULTURAL SCIENCES AND NATURAL RESOURCES[Internet]. 2008;15(1 (SPECIAL ISSUE ON NATURAL RESOURCES)):150-161. Available from: https://sid.ir/paper/9296/en

IEEE: Copy

J. VARVANI, A. NAJAFI NEJAD, and A. MIRMOEINI KARAHROUDI, “IMPROVING OF SEDIMENT RATING CURVE USING MINIMUM VARIANCE UNBIASED ESTIMATOR,” JOURNAL OF AGRICULTURAL SCIENCES AND NATURAL RESOURCES, vol. 15, no. 1 (SPECIAL ISSUE ON NATURAL RESOURCES), pp. 150–161, 2008, [Online]. Available: https://sid.ir/paper/9296/en

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