Statistical datum corrections to measured water levels for achieving inter-gage consistency in a large seasonally ponded wetland
by Kyle R. Douglas-Mankin
International Journal of Hydrology Science and Technology (IJHST), Vol. 8, No. 1, 2018

Abstract: Accurate, consistent water surface elevations (stages) among gages within a large waterbody are essential for accurate hydrological analyses. This study developed and tested a process of statistical stage bias-correction and quantified corrections needed to maintain consistency among gages. Ponded conditions with consistent water-surface elevations were identified within an Everglades wetland area using four screening criteria: three-day antecedent rainfall ≤ 0.25 mm/day, seven-day antecedent rainfall ≤ 5.1 mm/week, mean stage change from prior day ≤ 0.15 m, and difference between median marsh and canal stages ≤ 0.015 m. Historical stage values were adjusted based on long-term mean inter-gage bias. Adjustments up to 0.0472 m were needed to offset mean inter-gage bias among 12 canal and five marsh gages. Bias-corrected stages improved consistency over an independent one-year period. These methods apply to deriving statistical bias-correction values in other seasonally ponded water bodies and identifying gages requiring datum maintenance.

Online publication date: Thu, 14-Dec-2017

The full text of this article is only available to individual subscribers or to users at subscribing institutions.

 
Existing subscribers:
Go to Inderscience Online Journals to access the Full Text of this article.

Pay per view:
If you are not a subscriber and you just want to read the full contents of this article, buy online access here.

Complimentary Subscribers, Editors or Members of the Editorial Board of the International Journal of Hydrology Science and Technology (IJHST):
Login with your Inderscience username and password:

Username:        Password:          Forgotten your password?

Want to subscribe?
A subscription gives you complete access to all articles in the current issue, as well as to all articles in the previous three years (where applicable). See our Orders page to subscribe.

If you still need assistance, please email subs@inderscience.com