Reforestication analysis using temporal NDVI and ALOS-2 PALSAR-2 polarimetric data

Mapping Intimacies ◽

10.25743/sdm.2021.24.26.016 ◽

2021 ◽

Author(s):

I.I. Kirbizhekova ◽

T.N. Chimitdorzhiev ◽

A.K. Baltukhaev ◽

A.V. Dmitriev ◽

P.N. Dagurov

Keyword(s):

Test Site ◽

Pine Forest ◽

Optical Range ◽

Seasonal Fluctuations ◽

Rate Of Recovery ◽

L Band

The article presents the results of assessing the restoration of a pine forest on a test site in the vicinity of Ulan-Ude after the 2003 fire and reforestation work. The studies were carried out on the basis of the full polarimetric information of the L-band ALOS-2 PALSAR-2 from 2017–2019. and NDVI indices based on the optical range of Resurs-P and Landsat 1995–2021. The results of the polarimetric decomposition of the H-F-a-classification indicate significant differences between the test and reference forest areas. Studies of long-term seasonal fluctuations of the NDVI for the test site revealed differences in the rate of recovery of multi-seasonal tracks to the pre-fire level and the level of the reference forest areas.

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Long-term responses of ecosystem components to stand thinning in young lodgepole pine forest

Forest Ecology and Management ◽

10.1016/j.foreco.2006.02.026 ◽

2006 ◽

Vol 228 (1-3) ◽

pp. 69-81 ◽

Cited By ~ 26

Author(s):

Thomas P. Sullivan ◽

Druscilla S. Sullivan ◽

Pontus M.F. Lindgren ◽

Douglas B. Ransome

Keyword(s):

Lodgepole Pine ◽

Pine Forest ◽

Stand Thinning

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Sensitivity of Modeled C- and L-Band Radar Backscatter to Ground Surface Parameters in Loblolly Pine Forest

Remote Sensing of Environment ◽

10.1016/s0034-4257(98)00074-1 ◽

1998 ◽

Vol 66 (3) ◽

pp. 331-342 ◽

Cited By ~ 19

Author(s):

Yong Wang ◽

John L Day ◽

Frank W Davis

Keyword(s):

Loblolly Pine ◽

Ground Surface ◽

Pine Forest ◽

Radar Backscatter ◽

Surface Parameters ◽

L Band

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Modeling of an in-situ diffusion experiment in granite at the Grimsel Test Site

MRS Proceedings ◽

10.1557/opl.2014.632 ◽

2014 ◽

Vol 1665 ◽

pp. 85-91 ◽

Cited By ~ 2

Author(s):

Josep M. Soler ◽

Jiri Landa ◽

Vaclava Havlova ◽

Yukio Tachi ◽

Takanori Ebina ◽

...

Keyword(s):

Effective Diffusion ◽

Test Site ◽

Diffusion Experiment ◽

Bulk Rock ◽

Disturbed Zone ◽

Mean Grain Size ◽

Grimsel Test Site ◽

In Situ Diffusion

ABSTRACTMatrix diffusion is a key process for radionuclide retention in crystalline rocks. Within the LTD project (Long-Term Diffusion), an in-situ diffusion experiment in unaltered non-fractured granite was performed at the Grimsel Test Site (www.grimsel.com, Switzerland). The tracers included 3H as HTO, 22Na+, 134Cs+ and 131I- with stable I- as carrier.The dataset (except for 131I- because of complete decay) was analyzed with different diffusion-sorption models by different teams (NAGRA / IDAEA-CSIC, UJV-Rez, JAEA, Univ. Poitiers) using different codes, with the goal of obtaining effective diffusion coefficients (De) and porosity (ϕ) or rock capacity (α) values. A Borehole Disturbed Zone (BDZ), which was observed in the rock profile data for 22Na+ and 134Cs+, had to be taken into account to fit the experimental observations. The extension of the BDZ (1-2 mm) was about the same magnitude as the mean grain size of the quartz and feldspar grains.De and α values for the different tracers in the BDZ are larger than the respective values in the bulk rock. Capacity factors in the bulk rock are largest for Cs+ (strong sorption) and smallest for 3H (no sorption). However, 3H seems to display large α values in the BDZ. This phenomenon will be investigated in more detail in a second test starting in 2013.

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Bedforms, bed material, and bedload transport in a salt-wedge estuary: Fraser River, British Columbia

Canadian Journal of Earth Sciences ◽

10.1139/e89-122 ◽

1989 ◽

Vol 26 (7) ◽

pp. 1440-1452 ◽

Cited By ~ 49

Author(s):

R. A. Kostaschuk ◽

M. A. Church ◽

J. L. Luternauer

Keyword(s):

British Columbia ◽

River Discharge ◽

Bedload Transport ◽

Fraser River ◽

Seasonal Fluctuations ◽

Salt Wedge ◽

Migration Rates ◽

Material Load ◽

Bed Material

The lower main channel of the Fraser River, British Columbia, is a sand-bed, salt-wedge estuary in which variations in velocity, discharge, and bedform characteristics are contolled by river discharge and the tides. Bed-material composition remains consistent over the discharge season and in the long term. Changes in bedform height and length follow but lag behind seasonal fluctuations in river discharge. Migration rates of bedforms respond more directly to river discharge and tidal fall than do height and length. Bedform characteristics were utilized to estimate bedload transport in the estuary, and a strong, direct, but very sensitive relationship was found between bed load and river discharge. Annual bedload transport in the estuary is estimated to be of the order of 0.35 Mt in 1986. Bedload transport in the estuary appears to be higher than in reaches upstream, possibly because of an increase in sediment movement along the bed to compensate for a reduction in suspended bed-material load produced by tidal slack water and the salt wedge.

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