The Sierra Norte de Puebla, Mexico, has a record of hundreds of mass removal processes triggered by rainfall, where the intensity and duration of the rain are the main mechanisms. In order to determine threshold value...The Sierra Norte de Puebla, Mexico, has a record of hundreds of mass removal processes triggered by rainfall, where the intensity and duration of the rain are the main mechanisms. In order to determine threshold values for precipitation as a cause of a landslide, the prior, marginal and conditional probabilities were calculated. A Bayesian method was used for one-dimensional (precipitation intensity) and two-dimensional (precipitation intensity and duration) analysis. This suggested a high probability of mass movement when the precipitation exceeds 60 mm within ten days. A proposed warning system is based on classes in which the threshold is exceeded.展开更多
Hydrological studies for sizing urban drainage systems in the Amazon have often been neglected and little investigated for rainwater projects. This research evaluated alternative hydrological models used in sizing urb...Hydrological studies for sizing urban drainage systems in the Amazon have often been neglected and little investigated for rainwater projects. This research evaluated alternative hydrological models used in sizing urban drainage network projects in subdivisions with subsidized houses in the Amazonian region in Brazil. Statistical tests of these models were performed for both original and alternative scenarios. The methodological steps we conducted as follows: 1) evaluate the dimensioning of infrastructure project networks, considering two case studies contemplated by the Calha Norte Program (CNP) in the state of Amapá;2) test the statistical significance of the dimensioning of network diameters (α < 0.05), considering a) benchmark project (MD or M1) approved by the Ministry of Defense;b) determination of concentration time (C<sub>t</sub>) and rainfall intensity-duration-frequency (IDF) relationships, as well as estimating diameters using alternative models. The results indicated a significant influence on the diameters of the projected rainfall networks (p < 0.05), suggesting that alternative models predicted more unfavorable flow peaks than the original model. We conclude that the benchmarking model underestimated the diameter of the project compared to alternative models, which means the optimized C<sub>t</sub> parameter significantly impacts dimensioning estimates in rainwater projects in these Amazonian municipalities. This suggests that underestimated parameters in MD may cause inefficiency in the stormwater system projects in future similar scenarios.展开更多
20151907 Bai Yang(Key Laboratory of Petroleum Resources Research,Institute of Geology a nd Geophysics,Chinese Academy of Sci-ences,Beijing100029,China);Song Haibin Structural Characteristics and Genesis of Pockmarks i...20151907 Bai Yang(Key Laboratory of Petroleum Resources Research,Institute of Geology a nd Geophysics,Chinese Academy of Sci-ences,Beijing100029,China);Song Haibin Structural Characteristics and Genesis of Pockmarks in the Northwest of the South China Sea Derived from Reflective Seismic and展开更多
20130642 Bai Daoyuan (Hunan Institute of Geology Survey , Mineral Exploration and Development of Hunan Province , Changsha 410011 , China); Jia Baohua Potential Genesis of the Trending Changes of Jinning Period and Ca...20130642 Bai Daoyuan (Hunan Institute of Geology Survey , Mineral Exploration and Development of Hunan Province , Changsha 410011 , China); Jia Baohua Potential Genesis of the Trending Changes of Jinning Period and Caledonian Structural Lineamens in Middle-Southern Hunan Province (Journal of Geomechanics , ISSN1006-6616 ,展开更多
20090382 Deng Shenghui (Research Institute of Petroleum Exploration and Development, Beijing 100083, China); Lu Yuanzheng Fossil Plants from Lower Cretaceous of the Jiuquan Basin, Gansu Province, Northwest China and T...20090382 Deng Shenghui (Research Institute of Petroleum Exploration and Development, Beijing 100083, China); Lu Yuanzheng Fossil Plants from Lower Cretaceous of the Jiuquan Basin, Gansu Province, Northwest China and Their Palaeoclimatic Implications (Acta Geologica Sinica, ISSN0001-5717, CN11-1951, 82(1), 2008, p.104-114, 2 plates, 59 refs.)展开更多
20110016 Cheng Shoude(Xinjiang Institute of Geology and Mineral Recources,Urumqi 830000,China);Liu Tong The Brief Description of the Division of Tectonic Units in the Five-Countries in Central Asia(Xinjiang Geology,IS...20110016 Cheng Shoude(Xinjiang Institute of Geology and Mineral Recources,Urumqi 830000,China);Liu Tong The Brief Description of the Division of Tectonic Units in the Five-Countries in Central Asia(Xinjiang Geology,ISSN1000-8845,CN65-1092/P,28(1),2010,p.16-21,1 illus.,21 refs.)Key words:tectonics,tectonic units,Central Asia The Five-Countries in Central-Asia border on Xinjiang in the West China,research have been performed in this area,the gists of the division of tectonic units are different from each other and the results are different in a thousand and one ways.According as the investigations of sedimentary formation,conformation,展开更多
文摘The Sierra Norte de Puebla, Mexico, has a record of hundreds of mass removal processes triggered by rainfall, where the intensity and duration of the rain are the main mechanisms. In order to determine threshold values for precipitation as a cause of a landslide, the prior, marginal and conditional probabilities were calculated. A Bayesian method was used for one-dimensional (precipitation intensity) and two-dimensional (precipitation intensity and duration) analysis. This suggested a high probability of mass movement when the precipitation exceeds 60 mm within ten days. A proposed warning system is based on classes in which the threshold is exceeded.
文摘Hydrological studies for sizing urban drainage systems in the Amazon have often been neglected and little investigated for rainwater projects. This research evaluated alternative hydrological models used in sizing urban drainage network projects in subdivisions with subsidized houses in the Amazonian region in Brazil. Statistical tests of these models were performed for both original and alternative scenarios. The methodological steps we conducted as follows: 1) evaluate the dimensioning of infrastructure project networks, considering two case studies contemplated by the Calha Norte Program (CNP) in the state of Amapá;2) test the statistical significance of the dimensioning of network diameters (α < 0.05), considering a) benchmark project (MD or M1) approved by the Ministry of Defense;b) determination of concentration time (C<sub>t</sub>) and rainfall intensity-duration-frequency (IDF) relationships, as well as estimating diameters using alternative models. The results indicated a significant influence on the diameters of the projected rainfall networks (p < 0.05), suggesting that alternative models predicted more unfavorable flow peaks than the original model. We conclude that the benchmarking model underestimated the diameter of the project compared to alternative models, which means the optimized C<sub>t</sub> parameter significantly impacts dimensioning estimates in rainwater projects in these Amazonian municipalities. This suggests that underestimated parameters in MD may cause inefficiency in the stormwater system projects in future similar scenarios.
文摘20151907 Bai Yang(Key Laboratory of Petroleum Resources Research,Institute of Geology a nd Geophysics,Chinese Academy of Sci-ences,Beijing100029,China);Song Haibin Structural Characteristics and Genesis of Pockmarks in the Northwest of the South China Sea Derived from Reflective Seismic and
文摘20130642 Bai Daoyuan (Hunan Institute of Geology Survey , Mineral Exploration and Development of Hunan Province , Changsha 410011 , China); Jia Baohua Potential Genesis of the Trending Changes of Jinning Period and Caledonian Structural Lineamens in Middle-Southern Hunan Province (Journal of Geomechanics , ISSN1006-6616 ,
文摘20090382 Deng Shenghui (Research Institute of Petroleum Exploration and Development, Beijing 100083, China); Lu Yuanzheng Fossil Plants from Lower Cretaceous of the Jiuquan Basin, Gansu Province, Northwest China and Their Palaeoclimatic Implications (Acta Geologica Sinica, ISSN0001-5717, CN11-1951, 82(1), 2008, p.104-114, 2 plates, 59 refs.)
文摘20110016 Cheng Shoude(Xinjiang Institute of Geology and Mineral Recources,Urumqi 830000,China);Liu Tong The Brief Description of the Division of Tectonic Units in the Five-Countries in Central Asia(Xinjiang Geology,ISSN1000-8845,CN65-1092/P,28(1),2010,p.16-21,1 illus.,21 refs.)Key words:tectonics,tectonic units,Central Asia The Five-Countries in Central-Asia border on Xinjiang in the West China,research have been performed in this area,the gists of the division of tectonic units are different from each other and the results are different in a thousand and one ways.According as the investigations of sedimentary formation,conformation,
