Title :
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
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;
Conference_Titel :
Geoscience and Remote Sensing Symposium, 2000. Proceedings. IGARSS 2000. IEEE 2000 International
Conference_Location :
Honolulu, HI
Print_ISBN :
0-7803-6359-0
DOI :
10.1109/IGARSS.2000.860293
