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Tree biomass and carbon stock of a community-managed mangrove forest in Bohol, Philippines
Leni D. Camacho,Dixon T. Gevana,Antonio P. Carandang,Sofronio C. Camacho,Edwin A. Combalicer,Lucrecio L. Rebugio,윤여창 한국산림과학회 2011 Forest Science And Technology Vol.7 No.4
Mangrove plays a significant role in climate change mitigation particularly in carbon absorption and minimizing the detrimental impacts of sea level rise, salt-water intrusion and tidal surges. In Bohol Province, Philippines, a small coastal island community known as Banacon is one of the successful cases in mangrove reforestation. Recognizing the site’s potential for a carbon sequestration project, a biomass and carbon stock assessment of mangrove trees was done. Using standard sampling techniques and allometric equations, tree carbon storage was measured across stand ages, namely 15-, 20- and 40-year-old plantations. Mature natural stands were also included in the assessment. By estimate, the 40-year-old plantation has the largest carbon density with 370.7 ton ha71, followed by the 15-year-old plantation with 208.5 ton ha71, 20-year-old plantation with 149.5 ton ha71, and lastly by natural stand with 145.6 ton ha71. Overall, Banacon mangroves are in a vigorous condition of storing vast amount of carbon. Local community and government should therefore sustain their commitment in coastal reforestation activities in order to enhance the mangrove carbon stocks. Policies and programs that can help provide incentives and livelihoods to local people who are largely dependent on mangroves should likewise be explored in order to sustainably reap the economic and ecological benefits of conserving mangrove forest.
Modeling Water Balance for the Small-Forested Watershed in Korea
Edwin A. Combalicer,Sang Ho Lee,안수정,김동엽,임상준 대한토목학회 2008 KSCE JOURNAL OF CIVIL ENGINEERING Vol.12 No.5
In this paper, the water balance of the 15-ha forested watershed in the southern part of Korea was evaluated to determine the model performance and the fractions of precipitation that become streamflow, evapotranspiration, and ground water flow. The BROOK90 model, a lumped hydrologic simulation model, was calibrated and used for the water balance analysis. Results showed that the model efficiency performance of r2 and Nash-Sutcliffe were fitted quite well over the observed and simulated streamflow values. The water balance investigation showed that about 46 percent of the annual precipitation released as evapotranspiration, 39 percent as streamflow, and 15 percent for the seepage loss. The BROOK90 model was significantly correlated as compared to the PART and WHAT system programs in terms of ground water flow simulation. In particular, it can be asserted that the partitioned amount of water varied from one component to another as affected by seasonal variations, canopy, soil, and drainage flow characteristics.
Changes in the forest landscape of Mt. Makiling Forest Reserve, Philippines
Marilyn S. Combalicer,김동엽,이돈구,Edwin A. Combalicer,Rex Victor O. Cruz,임상준 한국산림과학회 2011 Forest Science And Technology Vol.7 No.2
Changes in the forest landscape of Mt. Makiling Forest Reserve were evaluated given the three different time periods of remotely sensed datasets using ISOCLUST method. The classification explicitly figured out that the forest areas are persistent or still intact while spatially expanding the coverage from the area. The change analysis revealed that the spatial distribution of various land-cover categories was subjected to gain and loss based on the latest and previous remotely sensed data sets. High gains for forest areas and many losses on agroforestry areas were established at certain time spans. The land cover by category denotes a decrease of forest areas between 1993 and 2002, and eventually increases in line with the latest period. The increase in agroforestry areas was merely detected between 1993 and 2002 and subsequently reduced the possible expansion of its area coverage. A great deal of land cover can be perceived to the restoration efforts made in the study area. Applying NDVI in the segmentation process during the image classification demonstrated to be a constructive approach of classifying land cover types.