Regional Evaluation of Hydrometric Monitoring Stations through Using Entropy Theory

Journal of Water Science & Engineering

مقاله 3، دوره 2، شماره 6، اسفند 2012، صفحه 29-46   

نوع مقاله: Original Article

نویسندگان

S Khalifeh^{* 1}؛ E Khalifeh²

¹Water Resources Engineering, Water Engineering Department, ShahidBahonar University of Kerman, Kerman,Iran.

²Ph.DCandidate of Water- civil, KhajeNassiroddineTosi University.

چکیده

Proper design and operation of monitoring systems for water resources management is one of the
most important issues of water quality and quantity and accuracy and adequacy of data. The proper
evaluation of these data has a determining role in the correctand consistent decisions in the area
covered by the system. Therefore, determining proper distribution and number of monitoring
network stations and evaluation of theadequacy of existing network stations are needed to eliminate
unnecessary stations and as a result decreasing costs of data productionthat are important
challenges in the future. In this study, a new approach, based on this theoryof regional value of
hydrometric stations in Bakhtegan- Maharlu watershed has been investigated. In this case, using
discrete entropy theory, existing limitations in theprevious studies were removed and considering
the indices of total information sent by the station S(i), total information received by the station
R(i) and total net information by the station N(i), the monitoring network has been assessed. The
results of sensitivity analysis showed that values of entropy indices are sensitive to variation of
data-classification interval. The calculated values of R(i) and S(i)are equivalent completely and
each station received as much information as it sent to other stations. In addition, with regard to
acceptable results by Storeajse relation, using this equation to determine the appropriate number of
classes is recommended. The obtained results showed that 4 out of 14 hydrometric Stations are in
critical conditions and it is recommendedthat they should be removed from the network.

کلیدواژه‌ها

Discrete entropy؛ hydrometric station؛ information indices؛ discrete intervals

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