Understanding of Cyprus total water storage under climate change

Gokhan Kayan, Esra Erten, Huseyin Mercan, Orkan Ozcan

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

3 Citations (Scopus)

Abstract

Satellite remote sensing provides a means of quantifying water budget variables over regions where in-situ measurements are scarce. This paper investigates the use of remote sensing products and WGHM (WaterGAP Global Hydrological Model) on water budget closure in Cyprus (35N-33W). The remote sensing products relate the terrestrial water storage change (ΔS) derived from Gravity Recovery and Climate Experiment (GRACE) with precipitation (P) derived from Tropical Rainfall Measuring Mission (TRMM) and evapotranspiration (ET) derived from the Moderate Resolution Imaging Spectroradiometer (MODIS). Their joint potential to close the water budget is examined over an 11-year period (2003-2013) by neglecting the effect of runoff (Q) in the equation. Q component is eliminated from the equation due to the short flow time of streams in Cyprus. WGHM results are also compared with the remote sensing results. Although WGHM does not contain deep groundwater, It generally shares same patterns with GRACE results and the correlation coefficient between them is 0.65. GRACE derived ΔS has higher amplitude than WGHM derived ΔS. This can be attributed to the contribution of deep groundwater and the infiltration from neighboring regions. Also, the amplitude of GRACE derived total water storage change is smaller than TRMM-MODIS because of the existence of poor discharge flowing out of the region. The total change in storage values generally vary between -60 and 150 mm/month except January of 2004. Unusual precipitation was seen at this month and the discharge due to precipitation should be accounted in the balance equation. This study also shows that the equivalent water height (EWH) in Cyprus faced with a significant decreasing trend with an average rate of -1.56 mm/a and -1.96 mm/a from GRACE and WGHM respectively.

Original languageEnglish
Title of host publication2017 IEEE International Geoscience and Remote Sensing Symposium
Subtitle of host publicationInternational Cooperation for Global Awareness, IGARSS 2017 - Proceedings
PublisherInstitute of Electrical and Electronics Engineers Inc.
Pages5591-5594
Number of pages4
ISBN (Electronic)9781509049516
DOIs
Publication statusPublished - 1 Dec 2017
Event37th Annual IEEE International Geoscience and Remote Sensing Symposium, IGARSS 2017 - Fort Worth, United States
Duration: 23 Jul 201728 Jul 2017

Publication series

NameInternational Geoscience and Remote Sensing Symposium (IGARSS)
Volume2017-July

Conference

Conference37th Annual IEEE International Geoscience and Remote Sensing Symposium, IGARSS 2017
Country/TerritoryUnited States
CityFort Worth
Period23/07/1728/07/17

Bibliographical note

Publisher Copyright:
© 2017 IEEE.

Keywords

  • Cyprus
  • Discharge
  • GRACE
  • MODIS
  • TRMM
  • Terrestrial water storage change
  • WGHM

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