scholarly journals Modelling flood regulation ecosystem services dynamics based on climate and land use information

2021 ◽  
Vol 88 ◽  
pp. 16
Author(s):  
Thea Wübbelmann ◽  
Steffen Bender ◽  
Benjamin Burkhard
Keyword(s):  
Land Use ◽  
Land Use Changes ◽  
Well Being ◽  
External Pressure ◽  
Water Levels ◽  
Climate Projections ◽  
Flood Hazards ◽  
Adaptation Measures ◽  
Retention Capacity ◽  
Flood Regulation

The concept of ecosystem service (ES) identifies benefits that people obtain from ecosystems with contributions to human well-being. One important ES under external pressure is “flood regulation” that describes an ecosystem’s capacity to reduce flood hazards. Several related studies estimate current flood regulation ES. However, regional climate projections indicate a shift in precipitation patterns. Therefore, Climate and land use changes make it necessary to assess future supply in order to test functionality and adaptation measures. This study focuses on surface retention ES. We used two methods to show the relevance of different landscape scenarios and climate information for flood regulation ES supply: 1) hydraulic simulations with the model HEC-RAS 2) the flood retention capacity indicator suggested by the German MAES-Working group. We simulated two events: the historic flood of 2013 and future hypothetically 10% higher water levels. Furthermore, three land use change scenarios were evaluated. The model results indicate water accumulation by vegetation. Higher water levels of future climate scenarios lead to an increase in flooded areas and higher water volumes. To evaluate flood regulation capacities, an approach solely based on 2D retention areas, such as the MAES-indicator, is not sufficient. Modelling approaches deliver the opportunity for future scenario simulations.

scholarly journals Future Impacts of Land Use Change on Ecosystem Services under Different Scenarios in the Ecological Conservation Area, Beijing, China

Forests ◽  
2020 ◽  
Vol 11 (5) ◽  
pp. 584 ◽  
Author(s):  
Zuzheng Li ◽  
Xiaoqin Cheng ◽  
Hairong Han
Keyword(s):  
Land Use ◽  
Ecosystem Services ◽  
Land Use Change ◽  
Carbon Storage ◽  
Soil Conservation ◽  
Land Use Changes ◽  
Conservation Area ◽  
Trade Offs ◽  
Ecological Conservation ◽  
Flood Regulation

Ecosystem services (ES), defined as benefits provided by the ecosystem to society, are essential to human well-being. However, it remains unclear how they will be affected by land-use changes due to lack of knowledge and data gaps. Therefore, understanding the response mechanism of ecosystem services to land-use change is critical for developing systematic and sound land planning. In this study, we aimed to explore the impacts of land-use change on the three ecosystem services, carbon storage (CS), flood regulation (FR), and soil conservation (SC), in the ecological conservation area of Beijing, China. We first projected land-use changes from 2015 to 2030, under three scenarios, i.e., Business as Usual (BAU), Ecological Land Protection (ELP), and Rapid Economic Development (RED), by interactively integrating the Markov model (Quantitative simulation) with the GeoSOS-FLUS model (Spatial arrangement), and then quantified the three ecosystem services by using a spatially explicit InVEST model. The results showed that built-up land would have the most remarkable growth during 2015–2030 under the RED scenario (2.52% increase) at the expense of cultivated and water body, while forest land is predicted to increase by 152.38 km2 (1.36% increase) under the ELP scenario. The ELP scenario would have the highest amount of carbon storage, flood regulation, and soil conservation, due to the strict protection policy on ecological land. The RED scenario, in which a certain amount of cultivated land, water body, and forest land is converted to built-up land, promotes soil conservation but triggers greater loss of carbon storage and flood regulation capacity. The conversion between land-use types will affect trade-offs and synergies among ecosystem services, in which carbon storage would show significant positive correlation with soil conservation through the period of 2015 to 2030, under all scenarios. Together, our results provide a quantitative scientific report that policymakers and land managers can use to identify and prioritize the best practices to sustain ecosystem services, by balancing the trade-offs among services.

scholarly journals Local Perspectives on Ecosystem Service Trade-Offs in a Forest Frontier Landscape in Myanmar

Land ◽  
2019 ◽  
Vol 8 (3) ◽  
pp. 45 ◽  
Author(s):  
Melanie Feurer ◽  
Andreas Heinimann ◽  
Flurina Schneider ◽  
Christine Jurt ◽  
Win Myint ◽  
...  
Keyword(s):  
Land Use ◽  
Oil Palm ◽  
Land Use Changes ◽  
Forest Products ◽  
Well Being ◽  
Rubber Plantations ◽  
Trade Offs ◽  
Land User ◽  
The Impact ◽  
Local Perspectives

Extensive land use changes in forest frontier landscapes are leading to trade-offs in the supply of ecosystem services (ES) with, in many cases, as yet unknown effects on human well-being. In the Tanintharyi Region of Myanmar, a forest frontier landscape facing oil palm and rubber expansion, little is known about local perspectives on ES and the direct impact of trade-offs from land use change. This study assessed the trade-offs experienced with respect to 10 locally important ES from land user perspectives using social valuation techniques. The results show that while intact forests provide the most highly valued ES bundle, the conversion to rubber plantations entails fewer negative trade-offs than that to oil palm. Rubber plantations offer income, fuelwood, a good microclimate, and even new cultural identities. By contrast, oil palm concessions have caused environmental pollution, and, most decisively, have restricted local people’s access to the respective lands. The ES water flow regulation is seen as the most critical if more forest is converted; other ES, such as non-timber forest products, can be more easily substituted. We conclude that, from local perspectives, the impact of ES trade-offs highly depends on access to land and opportunities to adapt to change.

scholarly journals Assessment of Potential Supply of Ecosystem Services in Coimbra Municipality

Proceedings ◽  
2019 ◽  
Vol 30 (1) ◽  
pp. 25
Author(s):  
Leitão ◽  
Ferreira ◽  
Ferreira
Keyword(s):  
Land Use ◽  
Ecosystem Services ◽  
Urban Areas ◽  
Land Use Changes ◽  
Qualitative Evaluation ◽  
Well Being ◽  
Positive Potential ◽  
Environmental Pressures ◽  
Quantitative Classification ◽  
Natural Systems

Land-use changes driven by human activities affect natural systems. Urbanization, forest monoculture and intensive agriculture are changing the functioning of many biotic and abiotic processes. This tends to decrease the ability of ecosystems to provide services, which leads to several problems particularly in cities. This study investigates the ability of urban areas with great population and environmental pressures, to supply ecosystem services. The study was carried out in Coimbra municipality, through the assessment of regulation, provisioning and cultural services. The quantification of ecosystem services was based on the evaluation performed by experts familiar with the study area, through questionnaires. A total of 31 questionnaires were completed. The experts ranked the potential supply of 30 ecosystem services for the 33 existent land-uses. based on a qualitative evaluation: “strong adverse potential”, “weak adverse potential”, “not relevant”, “low positive potential” and “strong positive potential”. The qualitative evaluation was converted into a quantitative classification (−2, −1, 0, 1, 2). The values were used to develop an ecosystem services quantification matrix and to map the information in the study area, using Geographic Information Systems (GIS). Despite the limited ecosystem services provided by urban areas, agricultural fields and especially green spaces are relevant for the provision of resources essential for human survival and well-being. The methodology used in this work is still useful for the quantification of ecosystem services in cities with characteristics associated with the Mediterranean climate. This type of studies are important to (i) anticipate problems originated from the loss of ecosystem services, (ii) identify good and bad practices of land use changes, (iii) the role of connectivity in maintaining biotic and abiotic processes, and (iv) develop practices that promote the sustainable development of societies.

scholarly journals Sustainable Development Under Competing Claims on Land: Three Pathways Between Land-Use Changes, Ecosystem Services and Human Well-Being

2020 ◽  
Vol 32 (2) ◽  
pp. 316-337 ◽  
Author(s):  
Flurina Schneider ◽  
Mélanie Feurer ◽  
Lara Maria Lundsgaard-Hansen ◽  
Win Myint ◽  
Cing Don Nuam ◽  
...  
Keyword(s):  
Land Use ◽  
Sustainable Development ◽  
Ecosystem Services ◽  
Land Use Changes ◽  
Well Being

Multitemporal geomorphological analysis to predict flash flood impacts: its contribution to inform flood risk management

2021 ◽  
Author(s):  
Gloria Furdada ◽  
Llanos Valera-Prieto ◽  
Sergi Cortés ◽  
Marta González ◽  
Jordi Pinyol ◽  
...  
Keyword(s):  
Land Use ◽  
Return Period ◽  
Flood Risk ◽  
Flash Flood ◽  
Land Use Changes ◽  
Water Levels ◽  
Data Series ◽  
Flow Zone ◽  
Major Floods ◽  
Geomorphological Analysis

<p>The 2016 implementation of the EU Flood Directive in Spain defines within the flood-prone zones the Preferential Flow Zone (Zona de Flujo Preferente, ZFP). This zone includes a) broadly, the area where the floods flow is concentrated; b) for the 100 years return period flood, the intensive drainage waterway and the zone dangerous to persons. The ZFP is usually defined for the 100 years flood applying hydraulic modelling. However, the calculation of the 100 years flood poses multiple limitations. For instance, different probability distributions produce different results for the same data series, or for rainfall and discharge data, depending on the time interval considered in the calculation, the results are also different. Regarding rainfall, the meteorological radar data are still too new to extrapolate to 100 years. The destruction of meteorological and gauging stations during storms and floods is not rare; hence, a lack of data on major events in the data series can deeply affect the calculations. Furthermore, similar rainfall can produce different discharges due to differences in the antecedent conditions or to land use changes. All the above and the climate change, question the hypothesis of stationarity at the base of the floods return period concept<sup>1</sup> and, thus, its calculation reliability.</p><p>Since the middle of the 20<sup>th</sup> century, significant socio-economic and land use changes occurred in the western Mediterranean region, resulting in changes in the morphology of rivers (e.g., reduced channel section, entrenchment). The record of these morphological changes, including the effects of major floods, can provide insights to define the high-energy flow zone or ZFP. This work contributes to determine the flash flood effects and, therefore, to define the ZPF, through multitemporal geomorphological analysis applied to a case study of the upper basin of the Francolí river in Catalonia, Spain. It was affected by several major floods in 1874, 1930, 1994 and 2019, where the first and the last events were the largest and of quite similar, centenial magnitude. Different reaches of the river are studied and compared to validate the analysis: reaches where 1994 and 2019 flood were similar and reaches where these floods were of very different magnitude; reaches where all the basic dataset is available (1946, 1956, 1995 post flood, pre and post 2019 orthophotos; 2003 detailed DTM; stereo photographs, post 2019 flood field data and GNSS-RTK data of river cross sections) and reaches with lack of some data (especially of the 1995 post flood image). Historical information (water levels attained by the past floods and the calculated discharges) are also used to complement and validate the geomorphological analysis results.</p><p>With this work we test whether the main geomorphic effects of the 2019 flood could have been predicted using the multitemporal geomorphological analysis. The ZFP can be reasonably determined for major floods in this Mediterranean river. This multitemporal geomorphological analysis appears as a good complementary tool to inform flood risk.</p><p><sup>1</sup> Sofia, G., E. I. Nikolopoulos, L. Slater (2020), It’s time to revise estimates of river flood hazards, Eos, 101, https://doi.org/10.1029/2020EO141499. 16 March 2020.</p>

scholarly journals Characterizing Land Use Systems within Awoja Watershed

2019 ◽  
Vol 2 (2) ◽  
pp. p1
Author(s):  
Charles Aben ◽  
John James Okiror ◽  
Jacob Godfrey Agea ◽  
Esbern Friis Hansen
Keyword(s):  
Land Use ◽  
Focus Group ◽  
Forest Cover ◽  
Climatic Factors ◽  
Local Governance ◽  
Land Use Changes ◽  
Water Levels ◽  
Small Scale ◽  
Focus Group Discussions ◽  
Group Discussions

This manuscript analyses trends in land use changes in Awoja Watershed with the aim of exploring the underlying causes of degradation in this watershed within the context of frequent draughts and floods. Changing trends of land use characteristics were used as indicators of ineffectiveness of control of access to resource use in the watershed. The study was carried out in the districts of Katakwi, Amuria and Sorotiin Eastern Uganda where the watershed is experiencing increasing trends of degradation despite the presence of elaborate watershed management institutions. The study used Remote Sensing, and focus group discussions to acquire relevant data on land use changes and their perceived causes. Perceptions of respondents on the effectiveness of the local governance processes were generated. The findings show increase in built-up areas from 0.21% between 1986-1996; to 3.28 between 2006 and 2016 and a notable decrease in forest cover from 107.48 Km2 in 1,986 to 6.94 Km2 by 2016. The results also show a dramatic increase in small scale farming area from 629.44 Km2 to 2,376.64 Km2 from 1986-2016 while the area of wetland reduced from 2,810.47 Km2 to 1,355 Km2over the same period. Results from focus group discussions revealed that although climatic and demographic factors were responsible for land use changes in Awoja, control of access to natural resources was inadequate to stop degradation. Climatic factors mentioned included increased frequency of floods and draughts that were perceived to have been responsible for changes in vegetation cover, water levels and infrastructure. Socio economic factors driving the changes in land use included increased cultivation of wetlands and communal land, increased sale of fuel wood, charcoal and sand, increased migration of cattle herders into the watershed during draughts and out of it during floods and increased fishing. While climatic factors were important, socio political factors such as displacements of communities, resettlements in the fragile environment brought about by government efforts to demarcate wetlands and wild life conservation areas were cited as drivers of degradation. The study concludes that besides climatic factors, inadequate management of access to resources was contributing to degradation of the watershed.

PEMANTAUAN PERUBAHAN GUNA TANAH MENGGUNAKAN APLIKASI PENDERIAAN JAUH DI PENAMPANG, SABAH

2020 ◽  
Vol 6 (1) ◽  
pp. 219-237
Author(s):  
Antonio Asik ◽  
Abdul Munir Hafizy Ladoni
Keyword(s):  
Land Use ◽  
Land Use Change ◽  
Development Process ◽  
Local Community ◽  
Land Use Changes ◽  
Well Being ◽  
Factors Affecting ◽  
Structure Changes ◽  
Erdas Imagine ◽  
Land Use Development

Penampang merupakan sebuah daerah yang terletak di bahagian Pantai Barat Negeri Sabah, berkeluasan 466 198 km2 dan telah mengalami proses pembangunan yang aktif semenjak beberapa tahun yang lalu. Kajian dilaksanakan bertujuan mengenalpasti pola perubahan guna tanah di daerah Penampang bagi tahun 2008 dan 2014 serta menentukan jenis guna tanah yang terdapat di kawasan kajian. Di samping itu, Kajian ini turut mengenalpasti implikasi dan faktor yang mempengaruhi perubahan guna tanah di kawasan kajian. Hal ini penting kerana perubahan guna tanah yang drastik memerlukan kajian dari semasa ke semasa bagi melihat sektor yang berperanan dalam meningkatkan perubahan struktur ekonomi dan telah melibatkan perubahan guna tanah secara keseluruhannya. Kajian ini mengaplikasikan kaedah Klasifikasi Terselia dan diproses dalam perisian Erdas Imagine 2014 untuk tujuan analisis. Hasil kajian mendapati guna tanah di daerah Penampang telah mengalami perubahan yang amat besar sepanjang tempoh kajian. Guna tanah yang telah mengalami perubahan ketara adalah hutan, tepu bina, kawasan lapang dan badan air. Penemuan kajian turut menunjukkan bahawa terdapat beberapa faktor yang mempengaruhi perubahan guna tanah serta wujud implikasi ke atas perubahan tersebut. Kajian ini juga mendapati pendekatan penderiaan jauh sesuai untuk diaplikasikan dalam kajian berkaitan perubahan guna tanah. Justeru itu, perancangan dan pengurusan yang sistematik dan efektif perlu dilaksanakan bagi mengawal pembangunan guna tanah di daerah Penampang. Ini penting kerana ia bukan sahaja sebagai petunjuk pembangunan dari perspektif fizikal, tetapi juga petunjuk kepada kesejahteraan awam terutamanya masyarakat setempat agar proses pembangunan berjalan secara terancang dan tidak mendatangkan kesan sampingan kepada persekitaran fizikal untuk generasi akan datang. enampang is a district located at the West Coast of the State of Sabah, with area of ​​466 198 km2 and has undergone an active development process for the past few years. This study was conducted to identify patterns of land use change in the Penampang for 2008 and 2014 and to determine the type of land use in the study area. In addition, to identify the implications and factors affecting land use change. This is important because drastic land use changes were needed from time to time to look at sectors that play a role in enhancing economic structure changes and involved land use changes as a whole. This study applies the Supervised Classification method and process in the Erdas Imagine 2014 software for analysis. The results show that land use in the Penampang area has undergone significant changes over the years. Land uses that have undergone significant changes are forests, wetlands, open spaces and water bodies. The findings of the study also show that there several factors that influence land use change and its implications. Besides, the sensing approach is well suited for application in land use changes studies. Therefore, systematic planning and management must implement to control land use development in Penampang district. This is important, not only a guide to development from a physical perspective, but also a guide to the well-being of the public and local community so that development process goes smoothly and has no adverse effect on physical environment for future generations.

The impact of two decades of land-use changes in potential ecosystem services supply in a Portuguese municipality - Coimbra

2020 ◽  
Author(s):  
Inês Amorim Leitão ◽  
Carla Sofia Santos Ferreira ◽  
António José Dinis Ferreira
Keyword(s):  
Land Use ◽  
Ecosystem Services ◽  
Urban Areas ◽  
Agricultural Land ◽  
Urban Expansion ◽  
Land Use Changes ◽  
Qualitative Evaluation ◽  
Well Being ◽  
Positive Potential ◽  
The Impact

<p>Land-use changes affect the properties of ecosystems, and are typically associated with decreasing ability to supply services, which in turn causes a decrease in the social well-being. Urbanization is identified as one of the main causes of ecosystem degradation, once it is considered an artificial space that replaces natural areas.This study investigates the impact of land-use changes during 20 years (1995-2015) on the potential supply of ecosystem services in Coimbra municipality, central Portugal. The assessment was based on the evaluation performed by 31 experts familiar with the study area, through questionnaires. The experts ranked the potential supply of 31 ecosystem services, grouped in regulation, provisioning and cultural services, for the several land-uses existent. Experts performed a qualitative evaluation, considering ‘strong adverse potential’, ‘weak adverse potential’, ‘not relevant’, ‘low positive potential’ and ‘strong positive potential’. The qualitative evaluation was converted into a quantitative classification (-2, -1, 0, 1, 2). Quantitative values were then used to develop an ecosystem services quantification matrix and to map the information in the study area, using Geographic Information Systems (GIS). An urban expansion from 14% to 18% was recorded over the last 20 years. Agricultural land decreased 8% due to conversion into forest (4% increase) and urban areas (4% increase). This has led to a decrease in the supply of provision (e.g. food) and regulation services (e.g. flood regulation). In fact, over the last years, recurrent floods have been increasingly noticed in Coimbra city. On the other hand, the growth of forest areas has led to an increase in general ESs supply. The adverse impacts of urbanization were partially compensated by enlarging the benefits provided by forest areas, which is the land-use with greatest ESs potential supply. In order to support urban planning and develop sustainable cities, it is essential to quantify the potential supply of ecosystem services considering local scale and characteristics.</p>

scholarly journals Heavy Rains, Human Activity, and Rising Waters at Lake Victoria

Eos ◽  
2020 ◽  
Vol 101 ◽  
Author(s):  
Hope Mafaranga
Keyword(s):  
Land Use ◽  
Human Activity ◽  
Lake Victoria ◽  
Land Use Changes ◽  
Water Levels ◽  
Heavy Rains

Water levels in Africa’s largest lake have risen over a meter since last fall and continue to increase as land use changes and heavy rains enhance the flow.

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