9 research outputs found
Nationwide Digital Terrain Models for Topographic Depression Modelling in Detection of Flood Detention Areas
Peer reviewe
Multisource Single-Tree Inventory in the Prediction of Tree Quality Variables and Logging Recoveries
Peer reviewe
Modern empirical and modelling study approaches in fluvial geomorphology to elucidate sub-bend-scale meander dynamics
Major developments in theory and modelling techniques have taken place within the past couple of decades in the field of the fluvial geomorphology. In this review, we examine the state-of-the-art empirical and modelling approaches and discuss their potential benefits and shortcomings in deepening understanding of the sub-bend-scale fluvial geomorphology of meander bends. Meandering rivers represent very complex 3D flow and sedimentary processes. We focus on high-resolution techniques which have improved the spatial and temporal resolution of the data and thereby enabled investigation of processes, which have been thus far beyond the capacity of the measurement techniques. This review covers the measurement techniques applied in the field and in laboratory circumstances as well as the close-range remote sensing techniques and computational approaches. We discuss the key research questions in fluvial geomorphology of meander bends and demonstrate how the contemporary approaches have been and could be applied to solve these questions.</jats:p
Airborne laser scanning outperforms the alternative 3D techniques in capturing variation in tree height and forest density in southern boreal forests.
ArticleBaltic Forestry. 24(2): 268-277. (2018)journal articl
Modern empirical and modelling study approaches in fluvial geomorphology to elucidate sub-bend-scale meander dynamics
We investigate the possible self-intersection numbers for sections of surface
bundles and Lefschetz fibrations over surfaces. When the fiber genus g and the
base genus h are positive, we prove that the adjunction bound 2h-2 is the only
universal bound on the self-intersection number of a section of any such genus
g bundle and fibration. As a side result, in the mapping class group of a
surface with boundary, we calculate the precise value of the commutator lengths
of all powers of a Dehn twist about a boundary component, concluding that the
stable commutator length of such a Dehn twist is 1/2. We furthermore prove that
there is no upper bound on the number of critical points of genus-g Lefschetz
fibrations over surfaces with positive genera admitting sections of maximal
self-intersection, for g at least two.Comment: 19 pages, 2 figures, minor revisions for publicatio