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Effect of Anthropogenic Activities on the Presence of Nitrogen Dioxide (NO2) Through Remote Sensing and Ground Based Observations over Emirate of Fujairah, UAE 通过对阿联酋富查伊拉酋长国上空的遥感和地面观测分析人为活动对二氧化氮(NO2)含量的影响
Pub Date : 2023-11-29 DOI: 10.11648/j.ajrs.20231102.13
Reem Yaqoub Yousif Ahmed Abdalla, Aseela Al Moalla, Mohamed Ateeg, Marwa Hossny, Shaher Bano Mirza, F. Ridouane
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引用次数: 0
Mangrove Information Extraction and Precision Analysis Based on Multi-Feature Combination 基于多特征组合的红树林信息提取与精度分析
Pub Date : 2023-08-28 DOI: 10.11648/j.ajrs.20231102.12
Mingli Zhou, Angying Xu, Chengming Yang, Lifeng Liang
: Extracting information of mangroves at different tide levels from remote sensing images is challenging. In this study, we investigated the use of multiple features for mangrove information extraction, including spectral features, vegetation indices (NDVI, NIMI)
:从遥感影像中提取不同潮位的红树林信息具有挑战性。在本研究中,我们探讨了利用光谱特征、植被指数(NDVI、NIMI)等多种特征提取红树林信息。
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引用次数: 0
Assessment and Classification of Cloud Coverage Using K-Means Clustering Algorithm for the Sentinel-3 LST Data: A Case Study in the Fujairah Region 基于K-Means聚类算法的Sentinel-3 LST数据云覆盖评估与分类——以富查伊拉地区为例
Pub Date : 2023-07-17 DOI: 10.11648/j.ajrs.20231102.11
Manar Ahmed Mohammed Alblooshi, Sirajul Huda Kalathingal, Shaher Bano Mirza, Fouad Lamghari Ridouane
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引用次数: 0
A Pedagogical Approach Using Digitalization and Heritage Building Information Modelling (HBIM) for a New Practice in Architecture and Archaeology 利用数字化和遗产建筑信息模型(HBIM)的教学方法在建筑和考古学中的新实践
Pub Date : 2023-03-09 DOI: 10.11648/j.ajrs.20231101.12
Meriem Zammel, Najla Allani
: In the past years, architectural heritage was represented and described through 2D plans, sections, perspective drawings, pictures, and texts. But, in the last decades, with the development of digital tools such as 3D scanner laser and photogrammetry, new technologies have been introduced in the digital survey of architectural heritage and 3D modelling. In this regard, we noticed that students, architects
:在过去的几年里,建筑遗产是通过二维平面、剖面图、透视图、图片和文字来表现和描述的。但是,在过去的几十年里,随着数字工具的发展,如3D扫描仪激光和摄影测量,新技术被引入到建筑遗产的数字调查和3D建模中。在这方面,我们注意到学生,建筑师
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引用次数: 0
Remote Sensing for Land Resources: A Review on Satellites, Data Availability and Applications 土地资源遥感:卫星、数据可用性和应用综述
Pub Date : 2023-01-10 DOI: 10.11648/j.ajrs.20221002.12
Winfred Mbinya Manetu, John Momanyi Mironga, Jackob Haywood Ondiko
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引用次数: 0
Google Earth Engine Based Approach for Assessment and Management of Flood in Ganga Sub Basin – Ghaghra Confluence to Gomti Confluence 基于谷歌Earth Engine的恒河次流域—加格拉至戈提汇合处洪水评价与管理方法
Pub Date : 2021-08-05 DOI: 10.11648/J.AJRS.20210902.11
Gayatri Dwivedi, Pragati Singh, A. Singh, R. Upadhyay
Floods are an intense and frequent disaster happening in numerous portions of the world. Flood is a excess of water that submerges surroundings that is normally dry. It is the sever problem in Ganga Sub Basin - Ghaghra Confluence to Gomti Confluence of Uttar Pradesh. Near real time mapping of inundated areas is very important for figuring out the flood extent, deployment of emergency reaction teams, and evaluation of damages and casualties. In this thesis work, a real time flood mapping and monitoring online WEB based application using Sentinel-1 time-series data has been developed on Google Earth Engine (GEE) platform. The SAR Data has Capability to see through the cloud and during the flood the major problem with optical data is, it can not see through the cloud. In this thesis work the SAR data has been used to identify the inundated pixels before and during flood to identify the extent and calamities due to flood. Flood is a hazardous natural phenomenon which severely affect lives, goods and services. Monitoring of flood affected area becomes compulsory for emergency responses but due to damage of network and risk for lives in going such areas it becomes a very typical task. Google Earth Engine (GEE) is an open-source cloud based online platform which reduces this problem. In this thesis work the GEE platform has been used for Near-Real time flood mapping in the study area. The GEE based app “FLOOD MONITORING SYSTEM: GANGA SUB BASIN – GHAGHRA CONFLUENCE TO GOMTI CONFLUENCE” has been developed for Near-Real time flood Mapping.
洪水是世界上许多地区频繁发生的严重灾害。洪水是一种过量的水,淹没了通常干燥的环境。这是恒河次流域-加格拉汇合处至北方邦贡蒂汇合处的严重问题。近实时的淹没区域测绘对于确定洪水范围、部署应急反应小组以及评估损失和人员伤亡非常重要。本文在Google Earth Engine (GEE)平台上,利用Sentinel-1时间序列数据开发了一个基于WEB的实时洪水制图与在线监测应用程序。SAR数据具有穿透云层的能力,而在洪水期间,光学数据的主要问题是无法穿透云层。本文利用SAR数据识别洪水前和洪水时的淹没像元,以识别洪水的程度和灾害。洪水是一种严重影响生命、货物和服务的危险自然现象。对受灾地区进行监测是应急响应的必要条件,但由于对受灾地区的网络破坏和对生命的威胁,对受灾地区进行监测成为一项非常典型的任务。谷歌地球引擎(GEE)是一个基于开源云的在线平台,它减少了这个问题。本文将GEE平台应用于研究区近实时洪水制图。基于GEE的应用程序“洪水监测系统:恒河流域- GHAGHRA汇合处到GOMTI汇合处”已开发用于近实时洪水制图。
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引用次数: 0
Land Use / Land Cover Change in the Western Highlands of Cameroon: Case of the Sabga-Bamunka Area (1980-2020) 喀麦隆西部高地土地利用/覆被变化:以Sabga-Bamunka地区为例(1980-2020)
Pub Date : 2021-05-08 DOI: 10.11648/J.AJRS.20210901.17
Tankie Quinta Shegwe, Wirsiy Destain Yungsi, Sirri Erika Suh, Tchana Christian Brice, Aloysious Kohtem Lebga, Takem Mbi Bienvenu Magloire, C. Ngouanet
Man has greatly influenced the environment through his different activities, technology and dynamism. These modifications are land use/land cover changes. This research describes and analyses the implication of land use dynamics on resources in the Sabga-Bamunka area over time and space from 1980 to 2020. Remote sensing techniques and Geographic Information System were used in describing and analysing land use/cover changes in the Sabga-Bamunka area. Primary data was obtained through field observation in order to confirm observation on satellite imageries. Land use maps were produced using GIS software. Maps were generated to show changes in land use/land cover which were transposed into table and bar graphs to show the magnitude of changes. The analysis of static land use maps of 1980, 2010 and 2020 all showed that there are significant changes observed on forest cover, farmland, grazing land and settlement area. The findings revealed that the study area has experienced a drastic change in land use/land cover during the last forty years. The study area is characterised with decrease in grassland areas, forest and increase in settlement and farmland due to the increasing population which are the main triggering force of land use/land cover changes that has led to the reduction in vegetal cover. Forest decreased from 6 568 hectares (26%) in 1980 to 2 842 hectares (10%) in 2020 indicating a magnitude change of -3726 (-29%) and grass land decreased from 16 434 hectares (64%) in 1980 to 14 585 hectares (53%) in 2020 that is a magnitude change of -1849 (-14%). These decreases gave way to settlements and farmland. Therefore, a reduction in the excessive consumption of fuel wood, the practice of eco-forestry, raising of awareness and a dialogue plate-form are amongst the measures recommended to reduce land use/land cover change in the study area.
人类通过不同的活动、技术和活力对环境产生了巨大的影响。这些变化是土地利用/土地覆盖的变化。本文描述并分析了1980 - 2020年Sabga-Bamunka地区土地利用动态对资源的时空影响。遥感技术和地理信息系统用于描述和分析Sabga-Bamunka地区的土地利用/覆盖变化。为了确认卫星影像上的观测结果,通过野外观测获得了第一手资料。利用GIS软件制作土地利用图。绘制地图以显示土地用途/土地覆盖的变化,并将其转换为表格和条形图,以显示变化的幅度。对1980年、2010年和2020年的静态土地利用图进行分析,发现森林覆盖、耕地、牧场和居民点面积都发生了显著变化。研究结果表明,近40年来,研究区土地利用/土地覆盖发生了巨大变化。由于人口的增加,研究区草地面积、森林面积减少,居民点和农田面积增加,这是土地利用/土地覆盖变化的主要触发力量,导致植被覆盖减少。森林面积从1980年的6568公顷(26%)减少到2020年的2842公顷(10%),变化幅度为-3726(-29%);草地面积从1980年的16434公顷(64%)减少到2020年的14585公顷(53%),变化幅度为-1849(-14%)。这些减少让位给了定居点和农田。因此,减少燃料木材的过度消耗、生态林业的实践、提高认识和对话平台形式是减少研究区域土地利用/土地覆盖变化的建议措施之一。
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引用次数: 0
Household Solid Waste, a Challenge of Urban Sanitation: Case of Ngor Municipality (Dakar, Senegal) 生活固体废物是城市卫生的挑战:以塞内加尔达喀尔恩戈尔市为例
Pub Date : 2021-04-26 DOI: 10.11648/J.AJRS.20210901.16
R. Ndiaye, Bouna Ndiaye, V. Traoré, A. Diaw
This study aims to understand factors that are causing the malfunction of the garbage collection system in the municipality of Ngor. To achieve this goal, we have adopted a methodological approach that focuses essentially on three components: (i) the investigation of 1/4 of Ngor's concessions through observation, interviews, questionnaires and documentation for collect socio-economic data; (ii) GPS surveys and mapping of the study area using GIS techniques and tools based on satellite images; (iii) analysis of collected information based on descriptive statistics. The results obtained reveal a bad garbage collection, which is at the origin of the insalubrities, the development of flies, mosquitoes and rodents having repercussions on the frame of life of the populations. It is also at the origin of the narrow streets, thus making access to neighborhoods difficult; this leads people to dispose of garbage in the open air or on the beach and in the evacuation channels, to the detriment of environmental concerns. This study has clearly highlighted deficiencies of human nature in the system of collection of household garbage in the municipality of Ngor. These results should provide the municipal authorities with a basis for thinking about the reformulation of their system of governance of such garbage and their political will to definitively solve the problem.
本研究旨在了解导致恩戈尔市垃圾收集系统故障的因素。为了实现这一目标,我们采用了一种方法方法,主要侧重于三个组成部分:(i)通过观察、访谈、问卷调查和收集社会经济数据的文件,对四分之一的Ngor特许权进行调查;利用基于卫星图像的地理信息系统技术和工具对研究地区进行全球定位系统调查和制图;(iii)根据描述性统计对收集到的信息进行分析。获得的结果表明,垃圾收集不良,这是不健康的根源,苍蝇,蚊子和啮齿动物的发展对人口的生活框架产生了影响。它也是狭窄街道的起源,因此很难进入社区;这导致人们在露天或海滩上以及疏散通道中处理垃圾,从而损害了环境问题。这项研究清楚地突出了恩戈尔市生活垃圾收集系统中人性的缺陷。这些结果应该为市政当局提供一个基础,以考虑如何重新制订其管理这类垃圾的制度,以及他们明确解决这一问题的政治意愿。
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引用次数: 0
A Web Based Google Earth Engine Approach for Irrigation Scheduling in Uttar Pradesh India Using Crop Water Stress Index 基于Web的谷歌地球引擎方法灌溉调度在印度北方邦利用作物水分胁迫指数
Pub Date : 2021-04-01 DOI: 10.11648/J.AJRS.20210901.15
Pragati Singh, A. Singh, R. Upadhyay
Upgrading water use in agricultural crops requires advancements in location of crop water stress for irrigation scheduling, at different phases of the developing season to limit crop physiological harm and yield reduction. Potential of satellite data provide spatial and temporal dynamics of crop growth condition under water stress and analyse for suggestion of irrigation. This study is based on real time open-source web-based Google Earth Engine (GEE) approach for irrigation scheduling at field level based on its water stress condition. Sentinel-2 data was used for detecting water stress using the NDVI and NDWI indices. NDVI shows the crop growth and health whereas NDWI its water stress condition, by combining both the indices we have generated a new index, which is Crop Water Stress Index (CWSI) to schedule the irrigation. The real time Sentinel-2 data was used extract NDVI and NDWI indices and by combining both the indices a new indice was generated for detecting crop water stress condition to schedule the irrigation in real time. The output comes in five group of water stress condition as; No Stress, Low stress, Moderate stress, High stress and Severe stress. Using the result of CWSI the immediate irrigation should be given to those fields which are facing severe and high stress, delayed in moderate and low stress and no irrigation in no-stress. The overall study indicates that, GEE provide a real time better platform for analysing Crop Water Stress situation for scheduling proper irrigation practices for proper growth of crops to improve the production and income of farmers as well as It helps the irrigation planner for proper management of canals and other irrigation resources to the wastage of water.
提高农业作物的用水水平需要在作物生长季节的不同阶段提高作物水分胁迫的位置,以便进行灌溉调度,以限制作物的生理危害和减产。卫星数据的潜力提供了水分胁迫下作物生长状况的时空动态和分析,为灌溉建议提供依据。本研究基于实时开源的基于web的Google Earth Engine (GEE)方法,基于农田水分胁迫条件进行灌溉调度。利用Sentinel-2数据利用NDVI和NDWI指数检测水分胁迫。NDVI反映的是作物的生长状况和健康状况,NDWI反映的是作物的水分胁迫状况,将这两个指标结合起来,我们得到了一个新的指标,即作物水分胁迫指数(CWSI),用于灌溉调度。利用Sentinel-2实时数据提取NDVI和NDWI指标,将两者结合生成新的指标,实时检测作物水分胁迫状况,实时调度灌溉。产量分为五组水分胁迫条件为;无压力,低压力,中等压力,高压力和严重压力。利用CWSI的结果,对面临严重和高胁迫的农田应立即灌水,对面临中、低胁迫的农田应延迟灌水,对无胁迫的农田应不灌水。总体研究表明,GEE提供了一个实时的更好的平台来分析作物水分胁迫情况,以便安排适当的灌溉措施,以促进作物的正常生长,提高农民的产量和收入,并帮助灌溉规划者对水渠和其他灌溉资源进行适当的管理,以减少水的浪费。
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引用次数: 1
The Degradation of the Bafut-Ngemba Forest Reserve Revisited: A Spatio-temporal Analysis of Forest Cover Change Dynamics 重新审视巴富特-恩格巴森林保护区的退化:森林覆盖变化动态的时空分析
Pub Date : 2021-03-26 DOI: 10.11648/J.AJRS.20210901.14
J. A. Maghah, Reeves M. Fokeng
Globally, forest reserves are created with a premier objective to conserve important biodiversity and to ensure ecosystems services provision. Unfortunately, forest reserves in the global south are threatened by the tremendous rise in human numbers and the unsustainable exploitation of forest resources. This is the problem facing protected areas (PAs), including forest reserves in Cameroon. The Bafut-Ngemba Forest Reserve (BNFR) is just a case in point of the many transformed and ecological twisted forest reserves in the Western Highlands of Cameroon. The BNFR is no biodiversity paradise as the humanisation of the reserve has taken an unprecedented toll in recent times. The study updated forest cover changes within the reserve from previous studies spanning across 2010-2021 as a baseline data towards the effective design of sustainable forest conservation planning. Satellite remote sensing employing high resolution ASTER (15m) and real-time Google Earth images were used to assess the forest cover dynamics. Between 2010 and 2015, forest loss was mild, either -27.135ha. From 2015-2021, in just less than 6 years, 696.397ha of forest cover was lost. For the entire study period (2010-2021), at total of 723.532ha of forest is estimated to have been lost. Forest loss in the BNFR is linked to some four anthropogenic stressors; farmland encroachment, eucalyptus colonisation, wood harvesting and cattle grazing alongside inter-annual fires used for pasture regeneration and rangeland management. Conservation efforts are urgently needed should the remaining threatened biodiversity, mostly avifauna is to be protected in line with monitoring progress to global targets and SDG 15.1.1.
在全球范围内,建立森林保护区的首要目标是保护重要的生物多样性和确保提供生态系统服务。不幸的是,全球南方的森林保护区受到人口数量急剧增加和对森林资源不可持续的开发的威胁。这是保护区(PAs)面临的问题,包括喀麦隆的森林保护区。巴富特-恩格巴森林保护区(Bafut-Ngemba Forest Reserve,简称BNFR)只是喀麦隆西部高地众多被改造和生态扭曲的森林保护区中的一个例子。BNFR不是生物多样性的天堂,因为保护区的人性化在最近的时间里付出了前所未有的代价。该研究更新了2010年至2021年期间保护区内森林覆盖的变化,作为有效设计可持续森林保护规划的基线数据。采用高分辨率ASTER (15m)卫星遥感和Google Earth实时影像对森林覆盖动态进行评估。2010年至2015年,森林损失较轻,为-27.135公顷。从2015年到2021年,在不到6年的时间里,失去了696.397公顷的森林覆盖。在整个研究期间(2010-2021年),估计总共损失了723.532公顷森林。BNFR的森林损失与大约四种人为压力因素有关;农田侵占,桉树殖民,木材采伐和放牧,以及用于牧场更新和牧场管理的年际火灾。如果要根据监测全球目标和可持续发展目标15.1.1的进展情况,保护剩余的受威胁生物多样性(主要是鸟类),就迫切需要开展保护工作。
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引用次数: 2
期刊
American Journal of Remote Sensing
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