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土地及空間研究院公開講座在香港理工大學成功舉行 (只有英文版本)

The RILS Public Lecture, held on 11 June 2025 at The Hong Kong Polytechnic University (PolyU), featured Prof. Yan LIU, Professor of Geographical Information Science at Department of Geography and Resource Management, The Chinese University of Hong Kong, who delivered an enlightening talk on "Advancing Computational and Spatial Social Sciences in the Era of Big Data: Opportunities and Challenges". The lecture was chaired by Prof. Qihao WENG, Associate Director of RILS, Director of RCAIG and Chair Professor of Geomatics and Artificial Intelligence. This successful event was jointly organised by the Research Institute for Land and Space (RILS), Department of Land Surveying and Geo-Informatics (LSGI), Research Centre for Artificial Intelligence in Geomatics (RCAIG), China Harbour – PolyU Joint Research Centre for Land Development, and PolyU-Yangjiang Laboratory Joint Research Centre for Offshore Wind Power of PolyU. Prof. LIU drew on her research at the University of Queensland to showcase the diverse applications of spatial data and analytical models in unveiling urban and social changes, including modelling urban growth, human social interactions, public transport policies, and population health. She also discussed contemporary issues and challenges in spatial social science research, such as data security, privacy and accessibility, and highlighted the need for new methodologies, including AI and machine learning, to handle big data sources. The lecture concluded with Prof. LIU sharing her thoughts on future opportunities in the emerging field of Computational and Spatial Social Sciences, inspiring attendees to explore the vast potential of this interdisciplinary field.

土地及空間研究院共同舉辦第三屆大氣與沿岸觀測天氣服務工作坊 (只有英文版本)

The third Workshop on Atmospheric and Coastal Observations for Weather Servicing (ACOWS 2024) was hosted by Prof. George LIU, Professor at the Department of Land Surveying & Geo-Informatics (LSGI) and member of Research Institute for Land and Space (RILS), at The Hong Kong Polytechnic University (PolyU) during 2-3 April 2025. This year’s theme, “Data Assimilation for a Better Weather Forecasting”, brought together experts to explore cutting-edge advancements in weather prediction methodologies. Renowned scientists from Mainland China were invited to attend this Workshop and present their work. They are Prof. Jianhua SUN from the Institute of Atmospheric Physics, Chinese Academy of Sciences, Beijing; Prof. Yaodeng CHEN from the School of Atmospheric Sciences, Nanjing University of Information Science and Technology; Dr Yerong FENG, Director, from the Guangdong–Hong Kong–Macao Greater Bay Area Weather Research Centre for Monitoring Warning and Forecasting, Shenzhen; Dr Yuanfu XIE, Chief Scientist, from the Guangdong–Hong Kong–Macao Greater Bay Area Weather Research Center for Monitoring Warning and Forecasting, Shenzhen; Prof. Donghai WANG from the School of Atmospheric Sciences, Sun Yat-sen University; and Dr Chunqing SHANG, the Huawei Technologies Company.   Presentations focused on innovative approaches to “Forecasting of Heavy Rainfall using multi-source PWV data assimilation and ensemble prediction”, a work package being led by Prof LIU. Discussions highlighted the integration of multi-source data to enhance predictive accuracy and address climate resilience challenges. The Workshop fostered interdisciplinary collaboration, bridging academic research with operational weather servicing needs.

土地及空間研究院研究揭示陸地土壞濕度急劇下降 陸地水流向海洋令海平面上升

隨着十年一遇農業及生態乾旱發生次數日趨頻繁，突顯了全球水文變化研究的迫切性。香港理工大學（理大）土地測量及地理資訊學系研究團隊與國際專家合作，結合現代空間大地測量觀測技術和全球水文變化數據，以創新分析方法估算過去四十年陸地水儲量變化，成功揭示土壤濕度急劇下降，大量陸地水流入海洋，導致海平面上升。研究為了解陸地水儲量劇減和海平面上升的背後驅動因素提供新見解，成果已於國際期刊《科學》發表。 地極運動反映了地球系統內的質量分布，因此整合大氣圈、水圈與岩石圈的模型及觀測結果尤為重要。然而，以往技術難以測量陸地水儲量，特別是地下水和根部區域的土壤濕度。理大土地測量及地理資訊學系教授、土地及空間研究院核心成員陳劍利教授及國際團隊採用創新的方法，利用衛星測高和衛星重力，即「重力恢復及氣候實驗衛星」（GRACE）及其接續計劃「GRACE Follow-On」現代空間大地測量觀測技術，監測全球的陸地水儲量變化，並結合全球平均海平面及地極運動數據，了解全球陸地水儲量的流失模式。研究更引入嶄新的全球土壤濕度估算方法，提升大陸與全球土壤濕度模型的估算準確度，更有效地掌握氣候變化下的土壤濕度變化。 格陵蘭融冰是導致全球海平面上升的主要因素，每年令海平面上升約0.8毫米。是次研究發現，2000年至2002年間，全球陸地水儲量明顯下降，共有16,140億噸水流入海洋，是格陵蘭融冰量的兩倍，相當於使海平面上升4.5毫米；此後，陸地水儲量持續緩慢減少，且未有任何恢復跡象。 此外，相比1979至1999年間的全球陸地平均土壤濕度，2003至2021年間的土壤濕度明顯下降。地極在2003年至2011年間更向東經93°方向偏移58厘米，此發現進一步證明了土壤濕度持續下降，令陸地水儲量減少。團隊指出，全球氣候暖化、降雨模式改變及海洋溫度升高導致的降水不足和蒸散量穩定，可能是引致陸地水儲量驟減的關鍵因素。根據歐洲中期天氣預報中心的ERA5-Land土壤濕度資料，非洲、亞洲、歐洲和南美洲的陸地水儲量流失顯著；亞洲和歐洲的陸地水儲量在2000至2002年間急劇減少，受影響地區由東北亞及東歐擴展至東亞、中亞及中歐等地。 隨着中國東北和美國西部等地區農業灌溉規模擴大，以及全球綠化趨勢持續推進，在農業密集和綠化程度高的半乾旱地區，土壤濕度可能進一步降低。團隊建議將這些因素納入考量，以改善陸面模型的評估能力，更有效了解陸地水儲量的長期變化。 陳劍利教授表示：「海平面變化和地球自轉，是反映地球系統質量變化的指標，精確測量有關數據將更有效監測全球水循環中的大尺度質量變化。透過整合不同現代空間大地測量觀測數據，能全面地分析陸地水儲量變化與海平面上升的驅動因素，並為氣候及地球系統科學界探討乾旱問題提供可靠依據，有利各地制定合適的水資源和氣候變化緩解策略，應對氣候變化帶來的新挑戰。」

土地及空間研究院共同舉辦可持續城市發展與生態保護研討會 (只有英文版本)

The Hong Kong Polytechnic University (PolyU) and China Innovative Urban-Rural Governance Research Network (CIURG) co-hosted a workshop under the theme of Sustainable Urban Development and Ecological Conservation on 2 April 2025.  The workshop took place in the Mai Po Nature Reserve, a wetland listed as a “Ramsar site” for its international importance. Located in Yuen Long, the Mai Po Nature Reserve is hailed as paradise for migratory birds, providing diverse habitats such as gei wai, mangroves, intertidal mudflats, reedbeds and many more to local wildlife species including waterbirds, aquatic fauna and insects.  The sanctuary is facing ecological challenges as the Northern Metropolis project includes filling fish ponds and removing woodland in the Reserve to construct part of the San Tin Technopole, a new hub for clustered innovation and technology development. Against this background, the workshop brought together 31 leaders and representatives across different sectors and institutions, including universities, government bodies and non-governmental organisations, to explore actionable strategies for nature conservation for sustainable development.  The activity was co-organised by several PolyU units, including the Research Institute for Land and Space (RILS), the Research Centre for Nature-based Urban Infrastructure Solutions (RNUS), the Research Institute for Sustainable Urban Development (RISUD), and the Department of Civil and Environmental Engineering (CEE), together with CIURG. It included technical sessions and guided tour around the Reserve.  The technical sessions, chaired by Prof. DING Xiaoli, Director of RILS, and Prof. WANG Yuhong, Director of RNUS, covered multiple topics related to the workshop theme.  These included: the Northern Metropolis development plan; digital tourism; the plan, development, and protection of Hengshui Lake National Nature Reserve; sustainable blue economy; wildlife and plants conservation; and nature-based solutions in urban design. Other guest speakers included: Ms LEUNG Kar Yee, Carrie, Chief Engineer of North Development Office at the Civil Engineering and Development Department, HKSAR; Mr SU Wansheng, Chief Executive Officer of Fujian Ticket Payment Information Technology Co., Ltd.; Mr LIU Guangning, Director of Hengshui Lake National Nature Reserve; Ms Martin KATE, Consultant at Financing Marine Conservation; Ms. Camilla ZANZANAINI, Founder and Chief Executive Officer of Nature Makers Lab; Mr David STANTON, Executive Director of Ecology and Biodiversity-Hong Kong, Aurecon; Prof. CHEN Hongyue, Professor of South China Agricultural University; Prof. LUO Chunling, Professor of Guangzhou Institute of Geochemistry, Chinese Academy of Sciences; Prof. DENG Xiaomei, Associate Professor at Tsinghua University; Dr. NAZEER Majid, Research Assistant Professor at PolyU; Prof. HUANG Shuping, Associate Professor at Fujian University of Technology.  Participants had fruitful discussions and were guided through various natural habitats during the tour, enjoying an immersive experience in nature and rethinking the human-nature relationship. This workshop is funded by the Public Policy Research Funding Scheme of the Chief Executive’s Policy Unit, HKSAR.  RILS would like to thank all parties including participants, the World Wildlife Fund Hong Kong (WWF HK) and sponsor, for supporting this meaningful event.  

土地及空間研究院共同主辦水文測量主題研討會(只有英文版本)

The Research Institute for Land and Space (RILS) of The Hong Kong Polytechnic University (PolyU), together with the Hong Kong Institute of Surveyors (HKIS) and the Royal Institution of Chartered Surveyors (RICS), under the support of the Civil Engineering and Development Department (CEDD), has previously launched “The New Era of Hydrographic Survey”, a dedicated event series aimed at providing engineering professionals across universities, government bodies and industry with comprehensive insights into the latest advancements in the hydrographic surveying technology of CEDD, particularly the new survey vessel “Port Works 5” (PW5) of the department.   The second event of the series, a Joint Continuing Professional Development (CPD) Seminar on the theme, was successfully held on 26 March 2025, and was attended by over 100 participants.   Prof. DING Xiaoli, Director of RILS, opened by seminar by extending a warm welcome to all participants and highlighting the growing importance of hydrographic surveying in marine infrastructure development and climate resilience as well as the critical role of interdisciplinary collaboration and innovation in advancing geospatial science.   The seminar featured presentations by representatives from several HKSAR government departments.  Speakers included: Sr CHEUK Yuet Wai, Tim, Assistant Hydrographer of the Marine Department; Sr CHENG Tsz-yan, Tess, Land Surveyor of the Lands Department; and Sr LEUNG Ching-hung, Cherry, Land Surveyor of CEDD.  Their sharing covered multiple areas related to PW5 and hydrographic survey services, including the design features that enable the vessel to operate in diverse marine environments and support a wide range of survey missions, the challenges faced during the construction of PW5, and the need for adaptability, innovation and continuous professional development in the field to meet evolving engineering and surveying industry demands.   A panel discussion, moderated by Dr KWAN Shun-hang, Julian, Assistant Director (Technical) of CEDD, followed, spurring conversation among participants on the challenges and opportunities in hydrographic survey.  All members had a fruitful exchange of views, acknowledging the importance of capacity-building in the field through cross-sectoral knowledge sharing and collaboration, thus contributing professional expertise to Hong Kong’s smart and sustainable city development.

土地及空間研究院副院長於「總領事講座」分享漂浮結構研究

由理大科技及創新政策研究中心主辦，應用社會科學系、環球事務處和土地及空間研究院鼎力支持的第六場「總領事講座」，於2025年3月25日在理大校園圓滿結束。   講座邀得荷蘭駐香港及澳門總領事Maurits TER KUILE先生主講，分享他在荷蘭外交事務上的經驗與見解。荷蘭在漂浮結構方面領先國際，為發展新一代水上建築和公共空間提供了良好範例。土地及空間研究院副院長趙曉林教授亦籍此機會，在活動中介紹了幾個在荷蘭的漂浮結構，有關漂浮城市的願景，土地及空間研究院在這個令人興奮的領域所開展的科研。

RILS協辦自然本位鄉村雙循環經濟工作坊(只有英文版本)

The Hong Kong Polytechnic University (PolyU) and China Innovative Urban-Rural Governance Research Network (CIURG) co-hosted a workshop under the theme of Nature-based Urban-Rural Dual Circular Economy on 10 March 2025.  Co-organised by several PolyU units including the Research Institute for Land and Space (RILS), the Research Centre for Nature-based Urban Infrastructure Solutions (RNUS) and the Research Institute for Sustainable Urban Development (RISUD), together with CIURG, the workshop brought together more than 50 leaders and representatives from diverse sectors, including universities, government bodies, non-government organisations and rural communities, to explore actionable strategies for promoting an urban-rural circular economy. Prof. LI Xiangdong, Dean of the Faculty of Construction and Environment, Director of RISUD, opened the workshop by emphasising the importance of a nature-based approach (NbS) in achieving sustainable and balanced urban and rural development.  The workshop included three engaging sessions that delved into topics including sustainable resource management, waste reduction, innovative land use policies, cultural heritage preservation, community empowerment, integrated urban-rural planning, and the role of technology in advancing environmental and economical practices. The sessions, each had a different sub-theme, were chaired by Prof. Ivy WONG Siu Wai, Convener of CIURG, Prof. WANG Yuhong, Director of RNUS, and Prof. DING Xiaoli, Director of RILS.  A distinguished line-up of speakers shared their insights and presentations on various topics. Featured guest speakers included: Prof. LING Kar-kan, Director of Jockey Club Design Institute for Social Innovation at PolyU; Ms XING Wenwei, Olivia, Founder of Hong Kong Urban-Rural Sustainable Development Association; Prof. TANG Man Bun, Stephen, Head of Countryside Conservation Office at the Environment and Ecology Bureau of the Hong Kong SAR Government; Ms LEUNG Kar Yee, Carrie, Chief Engineer of North Development Office at the Civil Engineering and Development Department of the Hong Kong SAR Government; Ms Kitty TAM, Programme Lead of Hong Kong 2025 from Civic Exchange; Prof. WONG Kam-sing, Former Secretary for the Environment of the Hong Kong SAR Government, and Chairman of Wu Zhi Qiao (Bridge to China) Charitable Foundation; Mr HE Yunhui, village leader from mainland China; and PolyU scholars including Prof. Ding, Prof. Ivy WONG Siu Wai, Prof. WANG Yuhong, Prof. LEU Shao-Yuan, Prof. Charles WONG Man Sing and Prof. DUAN Huan-Feng. The workshop encouraged cross-sectoral dialogues about NbS.  It also provided an important platform for exploring the potential application of NbS in the development of the Northern Metropolis and for fostering sustainable urban-rural development, and gaining a deeper understanding into the rural communities’ perspectives and needs. RILS would like to thank all participants for their valuable contributions to the workshop, and K. Wah Construction Materials Limited for inviting village leaders and representatives from the Northern Metropolis to join and enrich the discussions with their important views.

RILS代表團參觀土木工程拓展署新測量船「Port Works 5」（PW5）(只有英文版本)

A delegation from the Research Institute for Land and Space (RILS), led by Sr Prof. Ben CHAN, Professor of RILS and Prof. George LIU, RILS Core Member and Associate Head (Partnership) of the Department of Land Surveying and Geo-Informatics (LSGI) visited the new survey vessel “Port Works 5” (PW5) of the Civil Engineering and Development Department (CEDD), HKSAR.   This technical visit, a part of the event series “The New Era of Hydrographic Survey”, was jointly organised by RILS, the Land Surveying Division of the Hong Kong Institute of Surveyors (HKIS) and the Royal Institution of Chartered Surveyors (RICS), with the support of CEDD.  The event series aims to provide participants with comprehensive insights into the latest advancements in hydrographic surveying technology of CEDD.   The visit highlighted the innovative solutions including digital tools and advanced surveying techniques which CEDD adopted to address various challenges in efficiency, environmental sustainability and infrastructure resilience encountered in hydrographic surveying.  It also exemplified the importance of tripartite collaboration between government, professional institutions and academia.  During the visit, participants across the sectors engaged in fruitful discussions on the applications of hydrographic survey technology and the need for enhanced research and improved data accessibility in the field through interdisciplinary and cross-sectoral collaborations. The visit has provided an important platform for fostering cross-sectoral dialogues and networks essential for advancing hydrographic surveying.    Acknowledgment RILS extends the Institute’s gratitude to CEDD for facilitating this visit and providing valuable insights into PW5’s operations and technological advancements.  RILS would also like to thank all invited speakers and fellow participants for their inputs and participation during the visit.

段煥豐教授榮獲「2024年大禹水利科學技術進步獎」

熱烈恭賀土地及空間研究院成員、可持續城市發展研究院成員、土木及環境工程學系教授段煥豐教授，憑其「城市複雜供水管網實時水力模擬與精確調控關鍵技術」項目，獲國家水利部頒發「2024年大禹水利科學技術進步獎（二等獎）」。該獎項旨在表彰在水利科學技術領域取得傑出技術創新成果和重大貢獻，並帶來顯著經濟和社會效益的科研人員。   段教授專注於水力學與水資源的重點領域研究，當中包括城市水力學、城市基建資產管理、沿海城市洪災、水環境管理和計算流體力學。他至今帶領團隊進行了多個重要的研究項目，並獲多間香港和中國內地資助機構的撥款支持。

復旦大學王祥榮教授主講「城市生態安全與綠色發展」講座 (只有英文版本)

On 9 December 2024, Prof. Xiangrong WANG, Director and Distinguished Professor, Centre for Urban Eco-Planning & Design, Fudan University, China, delivered an online Public Lecture titled “Urban Ecological Security and Green Development”. This lecture was co-organised by the Research Institute of Land and Space (RILS) and the Research Centre for Nature-based Urban Infrastructure Solutions (RNUS) of the Hong Kong Polytechnic University.In this lecture, Prof. WANG presented the ecological security assessment of international metropolises, including London, New York, Hong Kong, Shanghai and etc. He analyzed this topic through three key aspects: 1) Origin and connotation: Ecological security of metropolises from a global perspective; 2) Exploration and cognition: Low-carbon development model of international metropolises under climate change; 3) Paths and countermeasures: Paths and countermeasures of urban green development based on nature-based solutions model.The lecture included a fruitful Q&A session, allowing participants to share their insights on the topic. This interactive discussion fostered a rich exchange of ideas, enhancing the collective understanding of urban ecological security and green development.About Prof. Xiangrong WANG:Prof. Xiangrong WANG is currently the director and distinguished professor of the Centre for Urban Eco-Planning & Design of Fudan University in Shanghai China, the director of National Centre for Virtual Simulation of Environmental Science, Fudan University, and the Vice Chairman of Urban Ecological Commission of Ecological Society of China, Chief supervisor of Shanghai Ecological Society. In addition, he is the Chair of Environmental Science and Healthy City Division of Shanghai Municipal Construction Commission, and Counselor of Shanghai Municipal People's Government, the editorial members of some academic journals, such as the editor-in-chief of Journal of World Forestry (Hans Press, USA), vice editor-in-chief of Journal of China’s Urban Forestry, editors of Acta Ecological Sinica, Chinese Journal of Ecology, Chinese Journal of Eco-Agriculture, Journal of Environmental Science & Technology, etc, and reviewers of some International Journals such as Ecological Engineering, Landscape and Urban Planning, and JHM, JCP. etc. He also served as a regional vice-chair of East Asia, the IUCN Commission on Education and Communication during 2004-2012 and a steering member of INTECOL Association.