Radar backscatter change from an ash in relation to its hydrological properties

Author

de Jong, J.J.M. ; de Groot, H.W. ; Klaassen, W. ; Kuiper, P.J.C.

Author_Institution

Lab. of Plant Physiol., Groningen Univ., Netherlands

Volume

7

fYear

2000

fDate

2000

Firstpage

2927

Abstract

A ground-based X-band radar was directed almost horizontally into the top of a mature ash during 5 months. The aim was to relate radar backscatter to hydrologic properties of leaves. The results show that: (1) Due to the retention of rain on the surface of leaves, the backscatter increased temporarily during and after showers. (2) The backscatter decreased the first days after a shower. This decrease is attributed to depletion of internal water-storage tissues. (3) The backscatter increases towards the end of the season. This trend is related to a decreased transpiration rate and increased water content of leaves

Keywords

backscatter; forestry; geophysical techniques; hydrological techniques; radar cross-sections; remote sensing by radar; vegetation mapping; AD 1999; Fraxinus excelsior; Holland; Netherlands; SHF; X-band; ash; backscatter; foliage; forest; forestry; geophysical measurement technique; hydrology; leaves; microwave scattering; moisture content; radar remote sensing; radar scattering; rain; rainfall; season; transpiration rate; tree; vegetation mapping; water content; water-storage tissue; Ash; Backscatter; Dielectric constant; Electrical resistance measurement; Immune system; Laboratories; Monitoring; Radar; Rain; Temperature;

fLanguage

English

Publisher

ieee

Conference_Titel

Geoscience and Remote Sensing Symposium, 2000. Proceedings. IGARSS 2000. IEEE 2000 International

Conference_Location

Honolulu, HI

Print_ISBN

0-7803-6359-0

Type

conf

DOI

10.1109/IGARSS.2000.860293

Filename

860293