Case Study of Modular Pre-cast Concrete On-Site Stormwater Detention Susyem during Monsoon Season in Southeast Asia

On-site stormwater detention system within a residential property is meant for an environmental protection device that temporarily stores stormwater within the property lot to mitigate flash flood, particularly during rainy seasons brought by the Northeast Monsoon. A field test was constructed in a house’s car porch with a 4.40 m x 4.70 m x 0.45 m tank filled with precast-concrete modular units with an effective storage volume of 3.97 m3. The system received water from a 95 m2 house roof via 0.1 m diameter pipe, discharged water via 0.05 m diameter pipe. It had recorded six observed storm events coincided with the 2019/2020 monsoon season that consisted 20-50 mm peak hourly rainfall, 0.0007-0.0018 m3s-1 inflow, 0.0005-0.0012 m3s-1 outflow and 0.21-0.47 m water level. Another four historical storm events coincided with the monsoon from 2015-2017 were sourced to augment the analysis. A computer model developed using the Storm Water Management Model was calibrated and verified using the six observed events. The Kolmogorov-Smirnov goodness of fit tests between the observed and modelled cumulative distributions had produced 0.01-0.14 maximum vertical distances that were lower than the 0.41-0.68 critical values indicating close matches. As such, the calibrated and verified model was used to simulate the historical storm events with 40-50 mm peak hourly rainfall and produced 0.0010-0.0013 m3s-1 inflow, 0.00072-0.00076 m3s-1 outflow and 0.41-0.45 m water level. By combining the field test and computer simulation model, it was found the system was able to contain all stormwaters from Northeast Monsoon. However, it had a weakness which the system was approaching its maximum capacity once the peak hourly rainfall exceeded 45 mm. With such a procedure in place, improvement could be carried out

Investigative modelling of the flood bypass channel in Kuching, Sarawak, by assessing its impact on the inundations of Kuching-Batu Kawa-Bau Expressway

Flood risks not only include loss of human lives and properties, but also the transportation and communication. One major road in Kuching, the Kuching-Batu Kawa-Bau Expressway is often flooded and interrupted by floodwaters from Sarawak River. The Sarawak State Government had announced to build a flood bypass channel in Sarawak River to mitigate flood under the Ninth Malaysian Plan. This paper is a study on the effects of the structure in the flooding of the mentioned road stretch. The January 2004 event which is locally known as a 100-year flood, was run through a developed river model incorporated with the bypass facilities. The model had indicated a reduction of 53% of flooded road. Similarly, modelling of 10 and 50-year design floods had predicted over 50% of reduction. The bypass channel was said to be able to alleviate the flooding on the major road stretch

Tools for Integrated River Flood Management (Hydraulics Modeling and Logical Framework Analysis)

Hydraulics simulation can be used as a supporting tool for planning and developing a framework, such as Integrated Flood Management for river management. To demonstrate this, a hydraulics model for the Sarawak River Basin was run using InfoWorks RS software by Wallingford Software, UK. InfoWorks River Simulation (RS) was chosen because its applicability has been proven and widely used to model Malaysian rivers. The extraction of computed floodwater level and flood maps for different time intervals would produce the rate of floodplain submergence from river bank level. This information could be incorporated into a logical framework to support decisions on flood management measures. Thus, hydraulics models can be used as tools to provide the necessary decision parameters for developing logical frameworks which would act as to guide the planning when it involved various stakeholders’ participation

Isolation and characterization of Desulfovibrio senezii sp. nov., a halotolerant sulfate reducer from a solar saltern and phylogenetic confirmation of Desulfovibrio fructosovorans as a new species

A new halotolerant #Desulfovibrio$, strain CVLT (T = type strain), was isolated from a solar saltern in California. The curved, gram-negative, nonsporeforming cells (0.3 x 1.0-1.3 micrometers) occurred singly, in pairs, or in chains, were motile by a single polar flagellum and tolerated up to 12.5$ was the nearest relative. Strain CVLT is clearly different from other #Desulfovibrio species, and is designated #Desulfovibrio senezii sp. nov. (DSM 8436). (Résumé d'auteur

ROMO1 is an essential redox-dependent regulator of mitochondrial dynamics

The dynamics of mitochondria undergoing fusion and fragmentation govern many mitochondrial functions, including the regulation of cell survival. Although the machinery that catalyzes fusion and fragmentation has been well described, less is known about the signaling components that regulate these phenomena. We performed a genome-wide RNA interference (RNAi) screen and identified reactive oxygen species modulator 1 (ROMO1) as a redox-regulated protein required for mitochondrial fusion and normal cristae morphology. We showed that oxidative stress promoted the formation of high-molecular weight ROMO1 complexes and that knockdown of ROMO1 promoted mitochondrial fission. ROMO1 was essential for the oligomerization of the inner membrane guanosine triphosphatase (GTPase) OPA1, which is required to maintain the integrity of cristae junctions. As a consequence, cells lacking ROMO1 displayed fragmented mitochondria and loss of cristae, causing impaired mitochondrial respiration and increased sensitivity to cell death stimuli. Together, our data identify ROMO1 as a critical molecular switch that couples metabolic stress and mitochondrial morphology, linking mitochondrial fusion to cell survival

Novel SNP improves differential survivability and mortality in non-small cell lung cancer patients

10.1186/1471-2164-15-S9-S20BMC Genomics159S2