Shrinkage of shrub forest and recovery of mire ecosystem by river restoration in northern Japan

Nakayama, Tadanobu

doi:10.1016/j.foreco.2008.07.017

Cited by 28 publications

(33 citation statements)

References 39 publications

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“…Combination of the National Integrated Catchment-based Eco-hydrology (NICE) model (Nakayama, 2008a(Nakayama, , 2008b(Nakayama, , 2009(Nakayama, , 2011a(Nakayama, , 2011bNakayama and Fujita, 2010;Nakayama and Watanabe, 2004, 2006, 2008a, 2008b, 2008cNakayama et al, , 2007 with complex components such as irrigation, urban water use, and dam/canal systems has led to the improvement in the model, which simulates the balance of both water budget and energy in the entire basin with a resolution of 10 km. The simulated results also evaluates the complex hydrological processes of river dry-up, agricultural/urban water use, groundwater pumping, and dam/canal effects, and to reveal the impact of irrigation on both surface water and groundwater in the basin.…”

Section: Wwwintechopencommentioning

confidence: 99%

“…2) (Nakayama, 2008a(Nakayama, , 2008b(Nakayama, , 2009(Nakayama, , 2011a(Nakayama, , 2011bNakayama and Fujita, 2010;Nakayama and Watanabe, 2004, 2006, 2008a, 2008b, 2008cNakayama et al, , 2007. The unsaturated layer divides canopy into two layers, and soil into three layers in the vertical dimension in the SiB2 (Simple Biosphere model 2) (Sellers et al, 1996).…”

Section: Coupling Of Process-based Model With Complex Irrigation Procmentioning

confidence: 99%

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Impact of Irrigation on Hydrologic Change in Highly Cultivated Basin

Nakayama¹

2012

Evapotranspiration - Remote Sensing and Modeling

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Section: Wwwintechopencommentioning

confidence: 99%

Section: Coupling Of Process-based Model With Complex Irrigation Procmentioning

confidence: 99%

Impact of Irrigation on Hydrologic Change in Highly Cultivated Basin

Nakayama¹

2012

Evapotranspiration - Remote Sensing and Modeling

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“…Drier conditions can lead to peat decay and increased fertility that facilitates forestation processes (Czerepko 2008). Lowering of the water table and increased nutrient input leads to the rapid spread of alder and willow species (Nakayama 2008) that can survive even in dry conditions. Our results are also in accord with the hypothesis of Balogh (2001) that raised bogs can be colonized by alder trees.…”

Section: Mire Dynamicsmentioning

confidence: 99%

Changes in a Wetland Ecosystem: A Vegetation Reconstruction Study Based on Historical Panchromatic Aerial Photographs and Succession Patterns

Cserhalmi

Nagy

Kristóf³

et al. 2011

Folia Geobot

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This paper presents the methodology and results of a vegetation reconstruction method based on botanical sampling, the knowledge of succession pattern, digital photograph-interpretation and automatic delineation via image segmentation. The aim is to provide a methodology for interpretation of archived black-and-white aerial photographs, which can be applied at other study sites. Our study area was the Nyíres-tó mire in the Bereg Plain (NE Hungary). Initially, botanical sampling was carried out, and this was followed by separation and identification of current vegetation types. In our study we selected automatic delineation using multi-resolution image segmentation as the method for vegetation mapping. Based on the present-day vegetation map produced and the known successional pathway of the mire, archive aerial photographs were analyzed separately in reverse chronological order to derive plant associations present at the different photograph acquisition dates. With this method we were able to make a chronological sequence of digital vegetation maps over a period of almost fifty years . The analysis of vegetation maps showed that forest cover increased steadily until 1988. After an artificial water supply was introduced (in 1986), the spread of tree-dominated associations became slower, and the relative cover of the different vegetation types reached a stable state.

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“…The NICE model series (NIES Integrated Catchment-based Eco-hydrology model) developed by Nakayama (2008aNakayama ( , 2008b includes surface-unsaturated-saturated water processes and assimilates land-surface processes as described by a leaf area index (LAI) and the fraction of photosynthetically active radiation (FPAR) derived from MODIS satellite data. LAI and FPAR are important parameters for evaluating vegetation growth (Justice et al, 1998).…”

Section: Nice Model Seriesmentioning

confidence: 99%

“…First, the characteristics of suspended sediment load during the snowmelt period are compared with those in the snow-free period. The NIES Integrated Catchment-based Eco-hydrology (NICE) model series (Nakayama and Watanabe, 2004, 2008a, 2008bNakayama et al, , 2007Nakayama, 2008aNakayama, , 2008b) is expanded to include the mass transport process in the Kushiro River catchment during the entire year (NICE-MASS). The process-based NICE-MASS evaluated and clarified the influence of vegetation distribution on solute and sediment runoff processes in comparison with the result of the simple sediment-rating curve.…”

Section: Introductionmentioning

confidence: 99%

Simulation of hydrologic and geomorphic changes affecting a shrinking mire

Nakayama¹

2009

River Research & Apps

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The Kushiro Mire in subarctic Japan has significantly reduced in size because of the complex interaction of many processes, including snowmelt runoff, sediment transport and vegetation dynamics. This study uses a coupled integrated catchment-based eco-hydrology model with a mass transport process (NICE-MASS) to investigate the influence of hydrologic and geomorphic changes on the Kushiro Mire. Coefficients of the sediment-rating curve in the snowmelt runoff are very different from those in the snow-free period. This empirical relation shall underestimate the observed suspended sediment (SS) concentration in the snowmelt period, indicating a difference in runoff mechanisms between the two periods and the necessity of a process-based model. The simulation model reproduced well the spatial distribution of elevation aggradations by sediment deposits from rivers flowing into the mire. NICE-MASS clarified that river channelization works carried out in the past resulted in groundwater degradation and drying phenomenon in the downstream area because of increased sedimentation and a decrease of seepage infiltration from the river to the aquifer. It is assumed that these hydrologic and geomorphic changes are closely related to the invasion of alder (Alnus japonica) into the mire. The occupation rate of alder is positively correlated with groundwater degradation relative to the ground surface. The model simulation derived by addition of this limiting factors related to submerged depth is important for prediction of vegetation succession when devising future policies for restoration of meandering river channels.

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Shrinkage of shrub forest and recovery of mire ecosystem by river restoration in northern Japan

Cited by 28 publications

References 39 publications

Impact of Irrigation on Hydrologic Change in Highly Cultivated Basin

Impact of Irrigation on Hydrologic Change in Highly Cultivated Basin

Changes in a Wetland Ecosystem: A Vegetation Reconstruction Study Based on Historical Panchromatic Aerial Photographs and Succession Patterns

Simulation of hydrologic and geomorphic changes affecting a shrinking mire

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