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Evaluation of an erosion-sediment transport model for a hillslope using laboratory flume data

Journal of Arid Land 2014年第6期6卷 647-655页

作者： Anya Catherine CARGUELLES MinJae JUNG kristine joy bmallari GiJung PAK Hafzullah AKSOY Levent M KAVVAS Ebru ERIS JaeYoung YOON YoungJoon LEE SeonHwa HONG Department of Environmental Engineering Korea University Sejong 339-700Korea Program in Environmental Technology and Policy Korea University Sejong 339-700Korea Department of Civil Engineering Istanbul Technical University Maslak 34469IstanbulTurkey Department of Civil and Environmental Engineering University of California DavisCalifornia 95616USA Department of Civil Engineering Ege University Bornova 35100IzmirTurkey Geum-River Environment Research Center National Institute of Environmental Research OkcheonChungbuk 373-804Korea

Climate change can escalate rainfall intensity and cause further increase in sediment transport in arid lands which in turn can adversely affect water quality. Hence, there is a strong need to predict the fate of sediments in order to provide measures for sound erosion control and water quality management. The presence of micro- topography on hillslopes influences processes of runoff generation and erosion, which should be taken into account to achieve more accurate modelling results. This study presents a physically based mathematical model for erosion and sediment transport coupled to one-dimensional overland flow equations that simulate rainfall-runoff generation on the rill and interrill areas of a bare hillslope. Modelling effort at such a fine resolution considering the flow con- nection between Jnterrill areas and rills is rarely verified. The developed model was applied on a set of data gath- ered from an experimental setup where a 650 cm×136 cm erosion flume was pre-formed with a longitudinal rill and interrJll having a plane geometry and was equipped with a rainfall simulator that reproduces natural rainfall characteristics. The flume can be given both longitudinal and lateral slope directions. For calibration and validation, the model was applied on the experimental results obtained from the setup of the flume having 5% lateral and 10% longitudinal slope directions under rainfall intensities of 105 and 45 mm/h, respectively. Calibration showed that the model was able to produce good results based on the R2 （0.84） and NSE （0.80） values. The model performance was further tested through validation which also produced good statistics （R2=0.83, NSE=0.72）. Results in terms of the sedigraphs, cumulative mass curves and performance statistics suggest that the model can be a useful and an important step towards verifying and improving mathematical models of erosion and sediment transport.

关键词： climate change erosion rill and interrill physically based model sediment transport

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Continued circulation of a single genotype of dengue virus serotype 2 in the Philippines

引用

Asian Pacific Journal of Tropical Medicine 2014年第1期7卷 30-33页

作者： joy Ann G Petronio Ricky B Vinarao kristine Marie G Flores Raul V Destura Institute of Molecular Biology and Biotechnology National Institutes of Health-University of the PhilippinesManila Section of Molecular Diagnostics The Medical CityPhilippines

Objective:To obtain descriptive information of behavioral pattern in Chinese school-aged children with cleft lip and ***:A total of 93 cleft lip and palate patients between the age of 6-11 year-old and treated at West China Stomatology Hospital were *** another100 unaffected controls,matched for age and gender,were recruited randomly from a common primary school in *** review of medical records was used to obtain psychosocial *** were compared with published norms and controls to evaluate the risk of problems,separately for three diagnostic ***:The patients group had lower scores of social and academic competencies,especially those with facial deformity or speech *** difference was found in the aspect of activity *** patients showed elevations in behavior *** the type of behavior problems varied in different ***:Chinese school-aged children with cleft lip and palate are at raised risk for social and academic *** pattern of behavior problems displays differently depending on gender of the patient.

关键词： Cleft lip and palate CBCL Psychosocial adjustment Behavior problems

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爱的港湾

长喜欢乐英语

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长喜欢乐英语 2005年第6期 8-11页

作者： kristine 李强

贝丝对她爱慕已久的杰克说：“总有一天我会嫁给你。“她穿着最喜欢的带玩具熊的蓝色衬衣。四岁的她,蓝色的眼睛在阳光下闪闪发亮。杰克说：“不,不行,你还是一个小女孩呢。”加利福尼亚午后的微风吹拂着他浅棕色的头发。他从单杠上跳下... 详细信息

贝丝对她爱慕已久的杰克说：“总有一天我会嫁给你。“她穿着最喜欢的带玩具熊的蓝色衬衣。四岁的她,蓝色的眼睛在阳光下闪闪发亮。杰克说：“不,不行,你还是一个小女孩呢。”加利福尼亚午后的微风吹拂着他浅棕色的头发。他从单杠上跳下来,一路笑着跑回了教室。贝丝独自坐在那里,满脸迷惑,不知所措。她坐在高高的单杠上哭起来。她未来的丈夫怎么就这样走开了呢?

关键词： Phone

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