Methods for Measuring Iinfiltration Rate in Forest Floor in Hinoki Plantations

Onda, Yuichi; Tsujimura, Maki; Nonoda, Toshiro; Takenaka, Chisato

doi:10.3178/jjshwr.18.688

Cited by 18 publications

(7 citation statements)

References 5 publications

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“…In the 1960s in Japan, Japanese cypress was extensively planted as a major commercial tree species after clear cutting of the pre-existing forest [19-20]. More recently, due to the lack of labor force and the sluggish timber prices, there has been no timely thinning of the high density stands.…”

Section: A Case Study For Testing Topographic Effects On Evi and Ndvimentioning

confidence: 99%

Sensitivity of the Enhanced Vegetation Index (EVI) and Normalized Difference Vegetation Index (NDVI) to Topographic Effects: A Case Study in High-density Cypress Forest

Matsushita

Yang

Chen

et al. 2007

Sensors

606

297

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Vegetation indices play an important role in monitoring variations in vegetation. The Enhanced Vegetation Index (EVI) proposed by the MODIS Land Discipline Group and the Normalized Difference Vegetation Index (NDVI) are both global-based vegetation indices aimed at providing consistent spatial and temporal information regarding global vegetation. However, many environmental factors such as atmospheric conditions and soil background may produce errors in these indices. The topographic effect is another very important factor, especially when the indices are used in areas of rough terrain. In this paper, we theoretically analyzed differences in the topographic effect on the EVI and the NDVI based on a non-Lambertian model and two airborne-based images acquired from a mountainous area covered by high-density Japanese cypress plantation were used as a case study. The results indicate that the soil adjustment factor “L” in the EVI makes it more sensitive to topographic conditions than is the NDVI. Based on these results, we strongly recommend that the topographic effect should be removed in the reflectance data before the EVI was calculated—as well as from other vegetation indices that similarly include a term without a band ratio format (e.g., the PVI and SAVI)—when these indices are used in the area of rough terrain, where the topographic effect on the vegetation indices having only a band ratio format (e.g., the NDVI) can usually be ignored.

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Section: A Case Study For Testing Topographic Effects On Evi and Ndvimentioning

confidence: 99%

Sensitivity of the Enhanced Vegetation Index (EVI) and Normalized Difference Vegetation Index (NDVI) to Topographic Effects: A Case Study in High-density Cypress Forest

Matsushita

Yang

Chen

et al. 2007

Sensors

606

297

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“…The impact of the drops with high kinetic energy can lower the infiltration capacity of soils, as observed in unmanaged Japanese cypress plantations through experiments that generated drops with high kinetic energy similar to that of throughfall. For example, Onda et al (2005) reported an infiltration capacity of 26-34 mm h 1 in an experiment using a large-scale rainfall simulator with a sprinkler located above the tree canopy, while Kato et al (2008) found less than an 80 mm h 1 infiltration capacity using an oscillating nozzle rainfall simulator modified for use on steep hillslopes. Thus, the effect of the impact of drops with high kinetic energy should be taken into consideration when evaluating the infiltration rate in a forested area.…”

Section: Introductionmentioning

confidence: 99%

Variability of surface runoff generation and infiltration rate under a tree canopy: indoor rainfall experiment using Japanese cypress (Chamaecyparis obtusa)

Nanko

Onda

Ito

et al. 2010

Hydrological Processes

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Abstract:To estimate the variability of surface runoff generation and the infiltration rate on a bare surface in a forested area, indoor experiments were conducted using 13 runoff boxes and a single transplanted Japanese cypress tree (9Ð8 m in height) in a large-scale rainfall simulator with spray nozzles (at a height of 16 m). The surface runoff was measured for applied rainfall and for 12 kinds of throughfall with different intensities and kinetic energy (KE) (found among measuring points and canopy structures). While no surface runoff was observed for the applied rainfall, surface runoff was observed for throughfall in each runoff box. Compared with the applied rainfall, the throughfall had larger drops due to canopy drip generation and thus had higher kinetic energy, which decreased the infiltration capacity. The maximum stable infiltration rate (IR MAX ) was lowest for throughfall (44Ð2 mm h 1 ). Surface runoff generation and infiltration rates varied greatly under the canopy, even though the rainfall applications were identical and the runoff boxes had identical initial soil properties. The variability of IR MAX , ranging from 44Ð2 to 120Ð2 mm h 1 , was caused by the variability of the throughfall intensity and kinetic energy. The index showing the best correlation to IR MAX was the effective unit kinetic energy (KE 0 mm : J m 2 mm 1 ). The prediction of surface runoff generation in a forested area requires estimations of the spatial variations of the amount and kinetic energy of throughfall.

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“…comm.). This clearing of understory vegetation might have affected soil discharge because the decrease of understory vegetation and litter promotes soil erosion (Hattori et al, 1992;Yukawa and Onda, 1995;Onda et al, 2005).…”

Section: Effect Of Deforestation On Discharge Of Soil and Organic Mattermentioning

confidence: 99%

“…Additionally, the number of artificial forests without sufficient management practices has increased with the recent decrease in agricultural and forestry activities and the aging of the population. An increase in unmanaged artificial forests decreases the understory vegetation and infiltration capacity, thereby promoting overland flow and soil erosion (Yukawa and Onda, 1995;Onda et al, 2005).…”

Section: Introductionmentioning

confidence: 99%

Effect of deforestation on the transport of particulate organic matter inferred from the geochemical properties of reservoir sediments in the Noto Peninsula, Japan

et al. 2015

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The effects of artificial deforestation in the 1970s and the subsequent recovery process on the transport of particulate organic matter were investigated using reservoir sediments obtained from the Noto Peninsula in Japan. In 1975, the sedimentation rate increased to about 2.7 times its previous value because of deforestation and plantation activities in the catchment. The sedimentation rate remained high until 1991, suggesting that the erosion rate of soil and organic matter increased during the 15 years after the deforestation. This intensive erosion was induced by exposure of bare soil, forest management activities to remove understory vegetation, and heavy rainfall. Conversely, the d 13 C and d 15 N of the sediment organic matter has continued to decrease from the mid-1980s to the present time, despite the fact that the sedimentation rate has recovered to pre-deforestation levels. The decrease of the d 13 C and d 15 N of the sediment organic matter reflects a decrease in the contribution of soil organic matter, although post-depositional diagenesis and variability of the isotopic composition of the aquatic organic matter also affect the d 13 C and d 15 N. The decrease in the soil organic matter contribution suggests gradual recovery of vegetation, accumulation of forest floor organic matter, and reduction of soil erodibility. These results indicate that the change in the transport of organic matter continued for at least 35 years after the deforestation and plantation.

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Methods for Measuring Iinfiltration Rate in Forest Floor in Hinoki Plantations

Cited by 18 publications

References 5 publications

Sensitivity of the Enhanced Vegetation Index (EVI) and Normalized Difference Vegetation Index (NDVI) to Topographic Effects: A Case Study in High-density Cypress Forest

Sensitivity of the Enhanced Vegetation Index (EVI) and Normalized Difference Vegetation Index (NDVI) to Topographic Effects: A Case Study in High-density Cypress Forest

Variability of surface runoff generation and infiltration rate under a tree canopy: indoor rainfall experiment using Japanese cypress (Chamaecyparis obtusa)

Effect of deforestation on the transport of particulate organic matter inferred from the geochemical properties of reservoir sediments in the Noto Peninsula, Japan

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