Quantifying shape and multiscale structure of meanders with wavelets

Bart Vermeulen, A.J.F. Hoitink, G. Zolezzi, J.D. Abad, R. Aalto

Research output: Contribution to conferenceAbstractOther research output

51 Downloads (Pure)

Abstract

features in the landscape, but the processes shaping them, act on a wide range of spatial and temporal scales. This results in meanders that curve at several spatial scales with smaller scale curves embedded in larger scale curves.
Here, we show how to quantify the multi-scale structure of meanders from the valley scale until the sub-meander scale based on continuous wavelet transforms of the planform curvature. The zero crossings and maximum lines
of the wavelet transform capture the main characteristics of the meander shape and their structure is quantified in a scale-space tree (Figure 1). The tree is used to identify meander wavelength and how meanders are embedded in larger scale features. The submeander structure determines meander shape, which is quantified with two parameters: skewness and fattening. The method is applied to the Mahakam River planform, which features very sharp, angular bends. Strong negative fattening is found for this river which corresponds to angular non-harmonic meanders which are characterized by strong flow recirculation and deep scouring.
Original languageEnglish
Pages255-255
Number of pages1
Publication statusPublished - 2017
EventRCEM2017 Back to Italy: 10th Symposium on river coastal and estuarine morphodynamics - Trento-Padova, Italy
Duration: 15 Sep 201722 Sep 2017

Conference

ConferenceRCEM2017 Back to Italy
CountryItaly
CityTrento-Padova
Period15/09/1722/09/17

Fingerprint Dive into the research topics of 'Quantifying shape and multiscale structure of meanders with wavelets'. Together they form a unique fingerprint.

Cite this