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Correlation assessment and monitoring of the potential pollutants in the surface sediments of Pyeongchang River,Korea

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International Journal of Sediment Research 2011年第2期26卷 152-162页

作者： Md.Imran KABIR Hosik LEE Geonha KIM taesung jun Environmental Water Quality Lab Department of Environmental EngineeringChungju National University Department of Environmental Engineering Chungju National University Department of Civil and Environmental Engineering Hannam University

The study provides a baseline for the assessment of the organic and inorganic pollution specially, heavy metal contamination in the surface sediments of Pyeongchang River,South *** assessment of the study areas was done with respect to metal pollution load,ecological risk and geoaccumulated *** upon the used indices,a priority index(P) was used to rank the utmost contaminated *** the concentrations of mercury in all sediments were below the guideline, the significant enriched contamination was observed by all applied *** expected,the values of pollution load index(PLI),ecological risk index(RI) and geoaccumulation risk index(I) demonstrated lower heavy metal contamination in upstream areas compared to the downstream. Admittedly,sediments were unpolluted to slightly-polluted according to PLI while high to extremely high ecological risks were observed in several sediment ***,all the samples were uncontaminated as per *** simplification of I,the P,showed the utmost contaminated sediments with a value of ***,protective measures should be taken to the highly contaminated areas which are prioritized by PAdmittedly,the maximum concentrations of total organic carbon,total nitrogen,inorganic nitrogen,total phosphorous,inorganic phosphorous,calcium, magnesium,sodium and potassium were significantly observed as 7.8×10~4,3,185,36,1,032,3.7, 1,5163,2,881,669 and 4,076mg/kg accordingly.

关键词： Heavy metals Sediments Pollution load index Ecological risk index Simplified geoaccumulation risk index Priority index

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Spatio-temporal change in forest cover and carbon storage considering actual and potential forest cover in South Korea

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Science China(Life Sciences) 2015年第7期58卷 713-723页

作者： NAM Kijun LEE Woo-Kyun KIM Moonil KWAK Doo-Ahn BYUN Woo-Hyuk YU Hangnan KWAK Hanbin KWON taesung SUNG Joohan CHUNG Dong-jun LEE Seung-Ho Division of Environmental Science and Ecological Engineering Korea University GIS/RS Center for Environmental Resources Korea University Division of Forest Ecology Korea Forest Research Institute National Forestry Cooperative Federation Division of Forest Economics & Management Korea Forest Research Institute

This study analyzes change in carbon storage by applying forest growth models and final cutting age to actual and potential forest cover for six major tree species in South Korea. Using National Forest Inventory data, the growth models were developed to estimate mean diameter at breast height, tree height, and number of trees for Pinus densiflora, Pinus koraiensis, Pinus rigida, Larix kaernpferi, Castanea crenata and Quercus spp. stands. We assumed that actual forest cover in a forest type map will change into potential forest covers according to the Hydrological and Thermal Analogy Groups model. When actual forest cover reaches the final cutting age, forest volume and carbon storage are estimated by changed forest cover and its growth model. Forest volume between 2010 and 2110 would increase from 126.73 to 157.33 m^3 hm^-2. Our results also show that forest cover, volume, and carbon storage could abruptly change by 2060. This is attributed to the fact that most forests are presumed to reach final cutting age. To avoid such dramatic change, a regeneration and yield control scheme should be prepared and implemented in a way that ensures balance in forest practice and yield.

关键词： climate change final cutting age carbon storage national forestry inventory forest growth model

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