Abstract
Abstract. The potential of multi parametric polarimetric SAR (PolSAR) data for soil surface roughness estimation is investigated and its potential for hydrological modeling is evaluated. The study utilizes microwave backscatter collected from the DEMMIN test site in the North East of Germany during the AgriSAR 2006 campaign using fully polarimetric L-band E-SAR data. In addition to various measurements of soil physical properties, soil surface roughness was measured extensively using photogrammetric image matching techniques for ground truthing. The resulting micro-DSMs are analyzed to correlate a soil surface roughness index to three well established polarimetric roughness estimators. Good results are obtained for Re[ρRRLL] vs. RMS Height for areas with a polarimetric alpha angel α<40°, which is thus used to produce multi temporal roughness data of the test site. The proposed roughness inversion scheme showed sufficiently accurate results (RMSE=0.1) to allow for a first order assessment of soil-hydrological parameters (soil porosity, void ratio), which are crucial for the initialization and operation of hydrological surface models. While uncertainties remain, the dependency of soil bulk density parameters from surface roughness can be shown and thus highlights the potential of the retrieval approach for hydrological model applications.
Subject
General Earth and Planetary Sciences,General Engineering,General Environmental Science
Reference52 articles.
1. Allmaras, R. R., Burwell, R. E., Larson, W. E., and Holt, R. F.: Total porosity and random roughness of the interrow zone as influenced by tillage, USDA Conservation Research Report, 7, 1966.
2. Bertuzzi, P., Rauws, G., and Courault, D.: Testing roughness indices to estimate soil surface roughness changes due to simulated rainfall, Soil Till. Res., 17, 87-99, 1990.
3. Cerdan, O., Souchère, V. Lecomtze, V. Couturier, A., and Le Bissonnais, Y.: Incorporating soil surface crusting processes in an expert-based runoff model: Sealing and Transfer by Runoff and Erosion related to Agricultural Management – STREAM. Catena Vol., 189–205, 2001.
4. Cloude, S. R.: Eigenvalue parameters for surface roughness studies. Proceedings of SPIE Conference on Polarization: Measurement, analysis and remote Sensing II, Denver, Colorado, USA, 1999.
5. Cloude, S. R. and Lewis, G. D.: Eigenvalue Analysis of Mueller Matrix for Bead Basted Aluminium Surfaces, SPIE Polarisation Analysis and Measurement III, Proc. SPIE, AM107, July–August 2000, 2000.
Cited by
39 articles.
订阅此论文施引文献
订阅此论文施引文献,注册后可以免费订阅5篇论文的施引文献,订阅后可以查看论文全部施引文献