Conference Agenda

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Session Overview
Session
324R: Geospatial technology for land restoration and planning
Time:
Thursday, 25/Apr/2019:
1:30pm - 3:00pm

Session Chair: Teiji Watanabe
Session Chair: Ram Avtar
Session Chair: Yu-Pin Lin
Session Chair: Li-Pei Peng
Location: UniS-A -122
UniS Building, room A -122, basement, 72 seats
Session Topics:
How do we support transformation?

Session Abstract

Urbanization and industrialization are accelerating worldwide, especially in developing countries. Millions of people depend on agricultural land for their livelihoods. Due to large-scale utilization of land resources, it is degrading and is at high risk. Restoration and protection of land requires involving different stakeholders to co-design solutions that are socially, economically, and environmentally sustainable. Land degradation neutrality implies a balance between degradation processes and restoration activities. Most of the previous scientific research has been devoted to the assessment of land degradation, only limited information is available on the best practices for land restoration. There is a clear knowledge gap to use remote sensing in land ecosystem management and how land managers, practitioners, and policymakers evaluate loss, gain, and change in land-based ecosystems at multiple spatial and temporal scales. There are very few studies that clearly show the use of spatial tools for planning, implementing, and evaluating land ecosystem restoration projects and especially in multifunctional landscape restoration. In this proposed session we would like to welcome papers that incorporate novel and interesting techniques to study land restoration and planning. Priorities include novel techniques for quantifying and analyzing land change with the use of old and new remote sensors. Combining geographical data from multiple spatial, spectral and thematic scales and their spatial patterns are also among priorities. Well-prepared review papers are also welcomed. This session will support to implement United Nations Sustainable Development Goals (SDGs) 11 Sustainable Cities and Communities and 15 Life on Land. This will strengthen the capacity and knowledge of various stakeholders to sustainably manage land resources.

This session is co-organized by GLP’s two nodal offices: Japan Nodal Office and Taipei Nodal Office.

Session Organizers: Teiji Watanabe, Ram Avtar, Yu-Pin Lin, and Li-Pei Peng


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Presentations
Flash talk
ID: 266 / 324R: 1
333R Mapping land system through coupling the biophysical and socioeconomic attributes based on remote sensing and big data approaches
Keywords: Ecological land, Desertification, Sustainable development, Arid region

Mapping ecological land and its linkage to desertification

Hongqi Zhang

Institute of Geographic Sciences & Natural Resources Research, China, People's Republic of

Ecological lands are not intensively managed lands, which have ecological significance in protecting artificial oasis and preventing desertification in arid regions. The significant shrinkage and degradation of ecological lands in the land-use intensification process have caused severe desertification. However, there is a knowledge gap regarding the spatio-temporal pattern and detailed classification of ecological lands and its quantitative relationship with desertification. Taking the Tarim Basin as an example, we proposed a comprehensive classifica[1]tion system to identify ecological lands for 1990, 2000, and 2010, respectively, using multi-source datasets at large scales. Spatio-temporal changes of ecological lands were then characterized by map comparisons at de[1]cade intervals. Finally, statistical relationships between ecological lands and desertification were explored based on 241 watersheds. A rapid loss of ecological lands was demonstrated from 1990 to 2010. In the fragile watersheds, the ecological lands wermainly converted to desert; while in the watersheds with advanced oasis agriculture, artificial-oasis type reclaimed to arable land was the major change. The occurrence of desertification was closely related to the type, area proportion and combination patterns of ecological lands. Desertification was prone to occur in regions abundant in desert-vegetation type and saline type, while less serious desertification was observed in regions with high proportion of artificial-oasis type and wetland type. Policy intervention and reasonable water resource allocation were encouraged to prevent the substantial loss of ecological lands, especially for the water-limiting watersheds and periods.



Flash talk
ID: 765 / 324R: 2
324R Geospatial technology for land restoration and planning
Keywords: Urban expansion, food security, land cover change

Monitoring impacts of spatiotemporal urban expansion on agricultural land: A case study in Delhi

Ram Avtar

Hokkaiod University, Japan

India is developing rapidly, and most metro cities have lots of urban infrastructure projects. Delhi being a capital of India is also growing rapidly due to industrialization and rural-urban emigration. The land use in the National Capital Region (NCR) has changed dramatically, which causes a change in traditional land cover. Rapid urbanization and population growth are expected to increase pressure on agricultural production and leading to loss of biodiversity. Agriculture land was sold to the developer and turned into properties (housing/plots) but not all have tenants. Owners keeping the properties in the hope the value increases in the future. As a result, we are losing more agriculture land into urbanizations. This study explores the relationships between urban growth and landscape change, and their influence on agriculture production due to real estate development. In this study, we used multitemporal PALSAR and Landsat data to study urban expansion and its impacts on agriculture land. The updated information about land use/land cover and an unutilized area can help urban planners to quantify policies to reduce food security in urban areas.



Flash talk
ID: 861 / 324R: 3
324R Geospatial technology for land restoration and planning
Keywords: cultural ecosystem services, social values, landscape socialization, habitus, SolVES

Effects of landscape socialization on identifying social values of ecosystem services in the case of North Coast area, Taiwan

Li-Pei Peng, Hao-Yu Yang, Shi-Yin Chen

National Taiwan University, Taiwan

Cultural ecosystem service is often treated as a kind of qualitative approach to evaluate people’s social values. Identifying social values of landscapes relies on not only directly pointing out physical environment but also semiosis by landscape socialization for possible landscape planning. The semiosis regarding landscapes socialization is likely useful and influential to understand people’s social values of cultural services. The secondary landscape socialization stemmed from the habitus theory mentioned by sociologist Bourdieu and his followers is related to education and community participation. It is worthy to assume that the secondary landscape socialization may play a crucial role to identify the social values of cultural services. In this sense, we adopted the SolVES tool which is from United States Geological Survey to evaluate social values of landscape distributions. Two boundaries including Yangmingshan National Park and North Coast & Guaninshan National Scenic Area were utilized to represent conservation and recreation social values of cultural services, respectively. 328 of total 550 questionnaires were received and demonstrated 3,296 valid survey points. The result manifests our theoretical inference that respondents with both the higher education level and sense of community can perceive and identify more precise social values of landscapes in the conservation boundary, and vice versa. This implies that conservation values were obviously related to higher education level and higher sense of community so that promoting through environmental education and strengthening community activities for conserving purpose are necessary. Furthermore, the farmers comparing to non-farmers of respondents can perceive and identify more conservation social values of landscapes in the conservation boundary. The reason is likely that they usually struggle on the farming against natural disasters. However, the farmers also identified significantly more amounts of recreation values of landscapes in the recreation boundary that non-farmers. It means that their preferences to recreation landscapes are possibly increasing their additional incomes and expecting opportunities for recreational development. Hence, policies emphasizing young farmer succession and new rural returnees for farming can enhance both conservation and recreation values of cultural ecosystem services.



Full talk
ID: 293 / 324R: 4
324R Geospatial technology for land restoration and planning
Keywords: land degradation, restoration, forest biomass, climate change mitigation, comparative analysis

Comparative assessment of 154 restoration projects in Latin America and the Caribbean and their potential environmental impact

Johanna Erika Romijn1, Ruben Coppus2, Martin Herold1, Veronique de Sy1, Louis Verchot2

1Wageningen University & Research (WUR); 2International Center for Tropical Agriculture (CIAT)

Multiple global policy frameworks and international commitments, such as Sustainable Development Goal 15 (Life on Land) and the Bonn Challenge, aim to address the causes of degradation and restore degraded ecosystems and landscapes. A regional effort is Initiative 20x20 that aims to bring 20 million hectares of land into restoration by 2020 in Latin America and the Caribbean (LAC). The purpose of this research is to map and characterize recent, ongoing and planned restoration projects from various initiatives that are active in LAC, to perform a comparative assessment of the various initiatives, and to analyse their potential environmental impact. We produced a database of 154 restoration activities from Initiative 20x20 and other initiatives such as the Global Environment Facility (GEF), UNFCCC Clean Development Mechanism (CDM), Forest Investment Program (FIP), and many local projects led by local governments, NGOs and research institutes, and mapped them at province/municipality level. We characterized the projects and performed a comparative analysis for project size, biomes in which they operate, their project goals, activities, and the importance of biodiversity recovery within the projects. We used geospatial analysis to derive a map of potential forest biomass accumulation (restoration potential) for entire LAC and overlaid the project locations on this map. This enabled to assess the potential environmental impact of the projects in terms of climate change mitigation. The analysis showed that it is mainly the donor that determines in the nature of the restoration project and this was reflected in the project size, goals, activities as well as the project’s contribution to recover biodiversity and the potential to accumulate forest biomass and mitigate climate change. With our newly created restoration potential map, degraded areas with high restoration potential can be located where no projects are active yet. These areas could be used to prioritize new restoration projects.



Full talk
ID: 589 / 324R: 5
324R Geospatial technology for land restoration and planning
Keywords: GNSS; GIS; RS; ecological restoration; spatial tools

Ecological restoration planning aided by spatial tools of GNSS, GIS and RS: a case study in China

Shaoliang Zhang, Huping Hou, Yongjun Yang, Shi An

China University of Mining and Technology, China, People's Republic of

In ecological restoration planning, smart and accurate spatial data are prerequisite but they usually are collected and gathered and mined difficultly. Integrated “3S” technologies, i.e. GNSS (Global Navigation Satellite System), GIS (Geographical Information System), and RS (Remote Sensing) can provide a spatial tool for ecological restoration planning. GNSS can get all-weather, high-accuracy and continuously-spatial- position information of ecological elements, remote image can get whole and periodic information of interested ecological habitat, and GIS can manage and process well these data for ecological evaluation, spatial analysis, and aided decision-making in ecological restoration planning. The paper presents a case study using “3S” techniques and shares several useful skills and experiences. Taking Datong mining area where land subsidence, ground fracture, land slide were so serious that the villages had to relocate and the ecosystem had to be restored, as a case study, the paper applied GNSS to get land damage position such as land fracture, land slide, and so on, and applied RS images to get the previous and current data such as vegetation, land use, water body, and landscape, and applied GIS to aid the site selection of new village, the evaluation of ecological risk and environment quality, and sub-division of ecological restoration units. The results indicate that integrated “3S” can improve work efficiency, data accuracy, and scientific decision-making but there are many technical problems which are difficult to be resolved.



Flash talk
ID: 302 / 324R: 6
324R Geospatial technology for land restoration and planning
Keywords: Food security, Sustainable agriculture, Land suitability, Paddy rice field, Soil erosion risk

Land suitability analysis using spatial multi-criteria evaluation and AHP methods for paddy rice field allocation planning in Taiwan

Yung-Chieh Wang, Yu-Hsin Lu

National Chung Hsing University, Taiwan

Under the pressure of global population increase, resource overuse, and land degradation, sustainable agriculture for enhancing food security and alleviating resource depletion has been one of the key targets in the scope of sustainable land management. In Taiwan, the food security issue has been illustrated in the unbalanced domestic food producing structure, especially under the impacts of climate change, land degradation, and market fluctuation. The food self-sufficiency ratio has decreased, and many of the major crops highly depend on import. From 2003, the import of the most important staple food, rice, has exceeded the export. Other staple food and forage crops, including wheat and maize, are mostly exported. Utilizing geographical data and remote sensing images, we propose the research that attempts to alleviate the issues of food deficiency and resource overuse by mapping the high crop yield potential areas, in the mean while accounting the available soil and water resources and disaster risks. In this research, we analyze the soil physical and chemical conditions, available irrigation system, weather effects, and erosion risks, in order to map the agricultural land suitability for paddy rice field in Taiwan. Using the GIS interface, we apply the spatial multi-criteria evaluation method and AHP analysis to evaluate the land suitability for rice, and then construct the land suitability map. Based on the land suitability map, we calculate the land suitability of the current states of paddy field distribution from remote sensing images, and then propose alternatives for paddy field allocation plans that may result in higher crop yields while accounting the land suitability. The results of this research can provide a reference in farmland management for increasing crop production of rice, and to promote sustainable agriculture development in Taiwan.



Flash talk
ID: 405 / 324R: 7
107R Assessing, modelling, and analysing land use and land management impacts on the Earth system
Keywords: Cropland protection; Urban expansion; Ecological cost; Land management impacts;

Ecological cost of the implementation of strict cropland protection policy: a case study of Hubei, China

Qiushi Zhou, Xinli Ke

Huazhong Agricultural University, China, People's Republic of

Urban expansion worldwide takes a large amount of cropland and natural habitat around the cities. To guarantee food security in circumstance of rapid urbanization, a series of cropland protection policies are implemented in China. Implementation of dynamic system for cropland in China specifically requires cropland supplement practice, referring to that lost cropland due to urban expansion should be supplemented by new cropland, which results in loss of natural habitat such as forest and grassland. However, few researches explored the dynamic process of ecological impact from cropland supplement practice. Taking Hubei Province in central China as the study area, the LAND System Cellular Automata model for Potential Effects (LANDSCAPE) model was employed to simulate land use change in both scenarios with and without cropland supplement practice, while equivalent factor method was used to estimate ecosystem services values (ESV) for each land use scenario. By comparing loss of ESV in two land use scenarios, ecological cost of cropland supplement practice for urban expansion can be figured out. Results show that cropland supplement practice would pose a negative impact on the ecological environment with urban expansion. The ecological cost of cropland supplement practice would be about 315.62 ~ 459.28 (×10^4 CNY/km2), which is almost equal to direct ecological impact from urban expansion. Therefore, although strict cropland protection policies contributes great on food security for both China and the whole world, the ecological cost of cropland supplement practice should be taken into consideration to secure essential natural capital .