ANALYSIS OF TREND OF WATER LEVEL: IN CASE OF LAKE TANA, ETHIOPIA

Authors

  • Sintayehu Abie Diress Woldia University
  • Tulu Besha Bedada

DOI:

https://doi.org/10.48346/IMIST.PRSM/ajlp-gs.v3i3.18504

Keywords:

Satellite Altimetry, Mann Kendell test, Sen Slope estimate, Tana basin

Abstract

Lakes are integrator of environmental changes occurring at a regional to global scale and present a high variety of behaviors on a variety of time scale. Their crucial importance as water stocks and retaining given the significant environmental changes occurring worldwide at many anthropocentric levels has increased the necessity of monitoring all its morphodynamic characteristics i.e. water level, surface area and volume. In this paper a 57 years water level data obtained by combining Bahir Dar gauge station and satellite altimetry were analyzed for detection of trend using the non-parametric Mann-Kendall test in combination with the trend-free pre-whitening approach for correcting time series data sets for serial correlation. Sen’s slope method, a non-parametric alternative for estimating a slope for a univariate time series was used to determine the magnitude of trends.

Author Biographies

Sintayehu Abie Diress, Woldia University

Land Administration and surveying, Lecture

Tulu Besha Bedada

Ethiopia Geospatial Information Institute

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Published

30-11-2020

How to Cite

Diress, S. A., & Bedada, T. B. (2020). ANALYSIS OF TREND OF WATER LEVEL: IN CASE OF LAKE TANA, ETHIOPIA. African Journal on Land Policy and Geospatial Sciences, 3(5), 152–161. https://doi.org/10.48346/IMIST.PRSM/ajlp-gs.v3i3.18504

Issue

Vol. 3 No. 5: Special Issue, November 2020

Section

Land Policy and Regulatory Framework

License

The African Journal on Land Policy and Geospatial Sciences (AJLP&GS) is made available under the terms of the Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International License https://creativecommons.org/licenses/by-nc-sa/4.0/. Authors with free access retain the copyright of their manuscripts. All open access manuscripts are published under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided that the original work is properly cited. The use of general descriptive names, trade names, trademarks, etc. in this publication, even if not specifically identified, does not imply that applicable laws and regulations do not protect these names. Even though the advice and information in this journal are true and accurate as of the date of its publication, neither the authors, the editor, nor the publisher can assume any legal responsibility for any errors or omissions.

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