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Effects of Increasing Impervious Surface on Water Quality in Ile-Ife Urban Watershed, Southwestern Nigeria

Journal of Geoscience and Environment Protection 2022年第12期10卷 126-160页

作者： Olusola-Ige Olufayo Adetoro Victor Osarenren samuel oladimeji popoola Space Applications and Environmental Science Laboratory Institute of Ecology and Environmental Studie OAU Nigeria Obafemi Awolowo University Ile-Ife Nigeria Information Network Regional Advanced Space Technology Application Laboratory National Space Research and Development Agency (NASRDA) Ile-Ife Nigeria

The urban environment has continued to experience changes from increasing impervious surfaces, which alters the proper functioning of the ecological zones and impairs water quality in the watershed. Impervious cover is predominantly used as an indicator to assist in understanding and forecasting the impact of human actions and other related activities on aquatic resources. In this study, the rate of change in land uses using the impervious surface as an indicator, and the percentage of imperviousness on the effect on water quality in the urban watershed were assessed. Ile-Ife was delineated as an urban watershed, and the percentage of imperviousness from 2008 to 2016 and the effect of imperviousness on water bodies were assessed. The study utilized ASTERDEM, Worldview (0.46 m), IKONOS (1.4 m), Landsat (30 m) for 2008 and 2016, GPS and Drone (10 cm). Water sampling was carried out in selected locations as generated by the impervious surface analyst tool, (ISAT). The percentage (%) of impervious surfaces accounted for 59.4% (4567.1/7691.5ha) in 2008 and 70.3% (5408.2/7691.5ha) in 2016, from the total number of lands investigated. The turbidity values from low to high regions were 32.3, 55.9 and 82.4 NUT. Changes in LULC of the watershed led to increased surface temperature, impermeable surfaces, and decreased vegetation, which exposes the area to flooding and reduced water quality. This study emphasized the importance of GIS and its integration into urban changes and water quality assessment.

关键词： Urban Watershed Impervious Surface Water Quality ISAT OBIA Turbidity

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Flood Vulnerability Mapping: A Case Study of Okoko Basin, Osogbo

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Journal of Geographic Information System 2023年第5期15卷 580-596页

作者： Toyosi Beatrice Adedoja oladimeji samuel popoola Taofeek Abayaomi Alaga Adesola Elizabeth Akindejoye-Adesioye Cooperative Information Network National Space Research and Development Agency OAU Campus Ile-Ife Nigeria Flood Hazard Research Centre Middlesex University London London UK

This study employed Geographic Information System (GIS) and remote sensing approach to analyze the flood vulnerability areas in the Okoko basin area of Osogbo in Osun state, Southwestern Nigeria. High-resolution imageries, a Topographic map of the study area and a TCX software program (Version 2.0) were integrated using ArcGis (10.7). Some of the causative factors for flooding in the watershed were taken into account which are: Land use, Distance of buildings to drainage, Digital Elevation Model, and Slope. This study aimed at mapping the flood-vulnerable areas along the Okoko basin of Osogbo. In developing a flood risk/flood hazard map of the study area, and determining the level of expected disaster, a multi-criteria analysis was utilized. The factors considered were ranked in five classes with the highly vulnerable areas having the highest score of “5”. These factors were weighed according to the estimated significance of causing flooding. The study revealed that the study area has an estimated area of 17.85 km2 of which 14.2 km2 falls within the vulnerable areas while 3.6 km2 is on the least vulnerable areas. Moreover, out of 16,829 buildings in the study area, 8204 buildings were found susceptible to flood disasters. This research attempts to equip decision-makers to make accurate decisions and also serves as a mitigation measure for flood disaster management.

关键词： Hazard MCA (Multicriteria Analysis) Floodrisk TCX Software

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Street Mapping of Ife Metropolis, Osun State, Nigeria

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Journal of Geographic Information System 2016年第3期8卷 387-395页

作者： Idowu Sunday Kolawole Taofik Abayomi Alaga Samson Akintunde Ogunyemi oladimeji samuel popoola Mustapha Olayemi Oloko-Oba Advanced Space Technology Application Laboratory (ASTAL) Cooperative Information Network (COPINE) National Space Research and Development Agency (NASRDA) Obafemi Awolowo University Campus Ile Ife Nigeria

The importance of Remote Sensing and Geographic Information System in map making cannot be overemphasized because of its ability to integrate spatial data with non-spatial data and also communicate the resulting information in a way that everyone would understand. Several works have taken advantage of the abilities of these technologies to produce street maps using High Resolution Images. The increase in development in Ile Ife, Osun State, Nigeria, has brought about navigation challenge and associated difficulties. This work intends to produce a street map that will ease navigation within the study area and help in road network analysis, site suitability analysis etc. Aerial Photographs, captured in the year 2009 and GeoEye1 Satellite Image of 2011 were used to extract the road network of Ife Metropolis. The image was imported into ArcGIS environment, where the database was created having feature datasets such as roads and special features. To have all the elements in vector format, the image was digitized. The street names collected from the field work was inputted into the database and then subjected to cartographical processes. 512 Roads were captured within four classes of Road Network namely Express road (5), Secondary Road (25), Primary Roads (22) and Street Road (460). This field work revealed that a larger percentage of the roads were not paved, while most of the paved ones have deteriorated and the newly constructed ones were not documented. It also showed that some of the roads were not named according to the standard and some were not named at all. From this study, we recommend that the naming system should be standardized across the study area. It is also recommended that provision should be made for street map revision on a yearly basis so as to account for changes.

关键词： Remote Sensing Geographic Information System Aerial Photograph Digitization

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西北印度洋天休热液区热液成因矿物特征与分布及其指示意义

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海洋地质与第四纪地质 2020年第5期40卷 36-45页

作者：蔡翌旸韩喜球邱中炎王叶剑李谋 samuel Olatunde popoola 自然资源部海底科学重点实验室自然资源部第二海洋研究所杭州310012 上海交通大学海洋学院上海200240 浙江大学海洋学院舟山316021

海底沉积物中的热液成因矿物主要来自热液区热液产物堆积体的失稳垮塌搬运迁移和热液羽流自生矿物颗粒的沉降。热液成因矿物的类型和空间分布特征对于了解热液活动区的位置与范围具有重要的指示作用。天休热液区(3°41′N、63°50′E)... 详细信息

海底沉积物中的热液成因矿物主要来自热液区热液产物堆积体的失稳垮塌搬运迁移和热液羽流自生矿物颗粒的沉降。热液成因矿物的类型和空间分布特征对于了解热液活动区的位置与范围具有重要的指示作用。天休热液区(3°41′N、63°50′E)位于卡尔斯伯格脊超镁铁岩系中,本文对采自该热液区及其周边的共4站表层沉积物样品进行研究,分析热液成因矿物的组成、丰度和粒度的空间变化情况。研究表明,在热液喷口近端(0~0.22 km)同时分布有垮塌迁移及热液羽流沉降来源的热液成因矿物,其中垮塌来源的矿物呈砾—粗砂级,以古巴矿等金属硫化物矿物及铁氧化物为主;羽流沉降来源的矿物呈砂—泥级,以Cu-Zn-Fe硫化物矿物(等轴古巴矿、古巴矿、闪锌矿和磁黄铁矿等)为主。在远喷口端(1.84~6.05 km)主要分布有羽流沉降来源的热液成因矿物,以砂—泥级的金属氧化物和氢氧化物为主。热液成因矿物的类型、粒度、丰度在空间上呈现出的规律性分布特征可以示踪未知的活动和非活动热液区的位置,并作为多金属硫化物资源的找矿标志。

关键词：表层沉积物热液成因矿物天休热液区卡尔斯伯格脊印度洋

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Comparative study on the mineralogy and geochemistry of sediments near active and inactive hydrothermal sites of Wocan hydrothermal field on Carlsberg Ridge, Northwest Indian Ocean

Comparative study on the mineralogy and geochemistry of sedi...

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第八届全国成矿理论与找矿方法学术讨论会

作者： popoola samuel Olatunde HAN Xiqiu WANG Yejian QIU Zhongyan Ying Ye Department of Marine Science Ocean College Zhejiang University SOA Key Laboratory of Submarine Geosciences Second Institute of OceanographyState Oceanic Administration

＜正＞Modern seafloor hydrothermal system is a widespread feature of the global mid Ocean ridge *** represents the discharge of high temperature hydrothermal fluid circulations and cooling of the young Oceanic crust with resultant leaching of metals and subsequent changes in physical and chemical parameters,such as p H,salinity,ligands,temperature and redox *** hydrothermal fluids can be focussed via vent orifices forming black smokers or chimney structures on the sea floor,or diffused into the surrounding rocks and sediments

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Lessons learned:Symbiotic autonomous robot ecosystem for nuclear environments

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IET Cyber-Systems and Robotics 2023年第4期5卷 63-86页

作者： Daniel Mitchell Paul Dominick Emor Baniqued Abdul Zahid Andrew West Bahman Nouri Rahmat Abadi Barry Lennox Bin Liu Burak Kizilkaya David Flynn David John Francis Erwin Jose Lopez Pulgarin Guodong Zhao Hasan Kivrak Jamie Rowland Douglas Blanche Jennifer David Jingyan Wang Joseph Bolarinwa Kanzhong Yao Keir Groves Liyuan Qi Mahmoud A.Shawky Manuel Giuliani Melissa Sandison Olaoluwa popoola Ognjen Marjanovic Paul Bremner samuel Thomas Harper Shivoh Nandakumar Simon Watson Subham Agrawal Theodore Lim Thomas Johnson Wasim Ahmad Xiangmin Xu Zhen Meng Zhengyi Jiang James Watt School of Engineering Autonomous Systems and Connectivity DivisionUniversity of GlasgowGlasgowUK Department of Electrical and Electronic Engineering The University of ManchesterManchesterUK Bristol Robotics Laboratory University of the West of EnglandBristolUK Heriot-Watt University EdinburghUK

Nuclear facilities have a regulatory requirement to measure radiation levels within Post Operational Clean Out(POCO)around nuclear facilities each year,resulting in a trend towards robotic deployments to gain an improved understanding during nuclear decommissioning *** UK Nuclear Decommissioning Authority supports the view that human-in-the-loop(HITL)robotic deployments are a solution to improve procedures and reduce risks within radiation characterisation of nuclear *** authors present a novel implementation of a Cyber-Physical System(CPS)deployed in an analogue nuclear environment,comprised of a multi-robot(MR)team coordinated by a HITL operator through a digital twin *** development of the CPS created efficient partnerships across systems including robots,digital systems and *** was presented as a multi-staged mission within an inspection scenario for the hetero-geneous Symbiotic Multi-Robot Fleet(SMuRF).Symbiotic interactions were achieved across the SMuRF where robots utilised automated collaborative governance to work together,where a single robot would face challenges in full characterisation of *** contributions include the demonstration of symbiotic autonomy and query-based learning of an autonomous mission supporting scalable autonomy and autonomy as a *** coordination of the CPS was a success and displayed further challenges and improvements related to future MR fleets.

关键词： cyber-systems field robotics hazardous inspection human robot interaction industrial robotics mobile robots multi-agent systems multi-robot systems robotics service robots

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