{"title":"水坝诱导水流方案下河岸森林覆盖的长期变化:伴随的数值模拟视角","authors":"Bhagya Nallaperuma, T. Asaeda","doi":"10.1080/24705357.2019.1663714","DOIUrl":null,"url":null,"abstract":"Abstract River regulation affects downstream riparian vegetation dynamics. This paper investigates changes in vegetation cover along a steep reach of the Kitakami river in Japan, below the Gosho dam. Historical aerial imagery covering 60-years of both the pre- and post- dam construction phases is used to document land cover evolution. Changes in riparian forest cover are evaluated in relation to the corresponding hydrological regimes. A long-term trend in forest cover encroachment was revealed and a temporal correlation analysis confirmed a clear association with the modified water and sediment regime downstream of the dam. In addition, a numerical simulation of changes in spatial tree distribution using the dynamic riparian vegetation model (DRIPVEM) was undertaken. Validation of the simulation using the Kappa statistic showed a moderate-to-substantial agreement between model output and the photographic record.","PeriodicalId":93201,"journal":{"name":"Journal of ecohydraulics","volume":"161 1","pages":"106 - 112"},"PeriodicalIF":4.6000,"publicationDate":"2019-07-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"11","resultStr":"{\"title\":\"Long-term changes in riparian forest cover under a dam-induced flow scheme: the accompanying a numerical modelling perspective\",\"authors\":\"Bhagya Nallaperuma, T. Asaeda\",\"doi\":\"10.1080/24705357.2019.1663714\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"Abstract River regulation affects downstream riparian vegetation dynamics. This paper investigates changes in vegetation cover along a steep reach of the Kitakami river in Japan, below the Gosho dam. Historical aerial imagery covering 60-years of both the pre- and post- dam construction phases is used to document land cover evolution. Changes in riparian forest cover are evaluated in relation to the corresponding hydrological regimes. A long-term trend in forest cover encroachment was revealed and a temporal correlation analysis confirmed a clear association with the modified water and sediment regime downstream of the dam. In addition, a numerical simulation of changes in spatial tree distribution using the dynamic riparian vegetation model (DRIPVEM) was undertaken. Validation of the simulation using the Kappa statistic showed a moderate-to-substantial agreement between model output and the photographic record.\",\"PeriodicalId\":93201,\"journal\":{\"name\":\"Journal of ecohydraulics\",\"volume\":\"161 1\",\"pages\":\"106 - 112\"},\"PeriodicalIF\":4.6000,\"publicationDate\":\"2019-07-03\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"11\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Journal of ecohydraulics\",\"FirstCategoryId\":\"1085\",\"ListUrlMain\":\"https://doi.org/10.1080/24705357.2019.1663714\",\"RegionNum\":0,\"RegionCategory\":null,\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"Q2\",\"JCRName\":\"ENVIRONMENTAL SCIENCES\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Journal of ecohydraulics","FirstCategoryId":"1085","ListUrlMain":"https://doi.org/10.1080/24705357.2019.1663714","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q2","JCRName":"ENVIRONMENTAL SCIENCES","Score":null,"Total":0}
Long-term changes in riparian forest cover under a dam-induced flow scheme: the accompanying a numerical modelling perspective
Abstract River regulation affects downstream riparian vegetation dynamics. This paper investigates changes in vegetation cover along a steep reach of the Kitakami river in Japan, below the Gosho dam. Historical aerial imagery covering 60-years of both the pre- and post- dam construction phases is used to document land cover evolution. Changes in riparian forest cover are evaluated in relation to the corresponding hydrological regimes. A long-term trend in forest cover encroachment was revealed and a temporal correlation analysis confirmed a clear association with the modified water and sediment regime downstream of the dam. In addition, a numerical simulation of changes in spatial tree distribution using the dynamic riparian vegetation model (DRIPVEM) was undertaken. Validation of the simulation using the Kappa statistic showed a moderate-to-substantial agreement between model output and the photographic record.