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🛰 Satellite(s)

e.g., Jason-2.

📊 Monitoring element

Water surface height.

🧰 Description technique

Park (2020) employs the concurrent measurement of water levels over river and floodplain and analyses seasonal changes in water surface height differences between the two water bodies. Then hydrological Hydrological connectivity thresholds at different stages during the rising phase were are then identified , and then validated using field data and remote sensing-driven surface suspended sediment maps.

📏 Accuracy / Resolution

Root mean square error (RMSE): 0.6-2.1 m.

🗺 Case study

Amazon River.

Tip

Benefits

  • Decoupling the two indiscrete flooding processes during the rising phase: channelized and overbank processes is one of the major outcomes of this study.

  • The proposed approach is relatively straightforward to be used, and therefore it may be readily adapted by non-remote sensing experts.

Note

Limitations

  • Altimetry data is available only at the intersection with the satellite pass and not during the dry season.

  • Detailed mapping of flow routing patterns and sedimentation patterns in the floodplain, and how they influence floodplain landscape development still have to

Info

Applicability for Northland

Yes, possibly depending on availability of satellite imagery, in-situ data and characteristics of river of interest.

Publication references

📚 Park E. 2020. Characterizing channel-floodplain connectivity using satellite altimetry: Mechanism, hydrogeomorphic control, and sediment budget. Remote Sensing of Environment. 243:111783. doi:10.1016/j.rse.2020.111783.

🔗 https://repository.nie.edu.sg/handle/10497/22057

(info) Other comments or information

One of the promising alternatives to altimetric data would be integrating Interferometric Synthetic Aperture Radar (InSAR) techniques that can map floodplain water surface gradients.

Other references

📚 Schwatke, C., Dettmering, D., Bosch, W., Seitz, F., 2015. DAHITI–an innovative approach for estimating water level time series over inland waters using multi-mission satellite altimetry. Hydrol. Earth Syst. Sci. 19, 4345–4364.

🔗 https://hess.copernicus.org/articles/19/4345/2015/

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