Adrian Strauch

University of Bonn | Uni Bonn ·  Department of Geography

Wetlands are a key habitat within the Mediterranean biodiversity hotspot and provide important ecosystem services for human well-being. Remote sensing (RS) has significantly boosted our ability to monitor changes in Mediterranean wetlands, especially in areas where little information is being collected. However, its application to wetlands has some...

The wetlands are often coupled with anthropogenic systems. This makes them highly dynamic, and thus difficult to map and monitor from space. The Sentinel-1 constellation allows monitoring land changes regardless of cloud conditions and with a high frequency of pass. We use a time series of 33 Sentinel-1 dual-polarized images from 2016 to map season...

Wetlands are abundant across the African continent and provide a range of ecosystem services on different scales but are threatened by overuse and degradation. It is essential that national governments enable and ensure the sustainable use of wetland resources to maintain these services in the long run. As informed management decisions require reli...

Wetlands are among the most vulnerable, threatened, valuable, diverse, and heterogeneous ecosystems existing on our planet. While they provide invaluable ecosystem services to our society, they have been declining globally for many centuries. Monitoring of these changes is necessary for implementing efficient conservation policies and sustainable m...

This chapter underlines the need for interdisciplinary and transdisciplinary research to support drought risk monitoring for sustainable development using Earth observation (EO)‐based information products and socioeconomic statistics. While a large number of drought indicators already exists, clear guidance on how to embed these into policy advice...

Wetlands are the most fragile and threatened ecosystems worldwide, and also one of the most rapidly declining. At the same time wetlands are typically biodiversity hotspots and provide a range of valuable ecosystem services, such as water supply and purification, disaster risk reduction, climate change adaptation, and carbon sequestration. Pressure...

Wetlands are highly dynamic, with many natural and anthropogenic drivers causing seasonal, periodic or permanent changes in their structure and composition. Thus, it is necessary to use time series of images for accurate classifications and monitoring. We used all available Sentinel-1 and Sentinel-2 images to produce a national wetlands map for Alb...

Sub-Saharan African (SSA) wetlands are increasingly brought into focus as a possibility to increase food security. Accordingly, agricultural development in Rwanda’s extensive wetland landscapes is strongly promoted. However, agricultural use is a major reason for wetland degradation and often in conflict with conservation efforts. Detailed and up-t...

There is a growing awareness that data obtained from Earth Observation (EO) has the potential to provide the information needed for accurate wetland inventory, assessment and monitoring, and for updating a number of data fields in the Ramsar Sites Information Sheets (RIS). The latter includes: the physical features of the wetland, the presence and...

The DeMo-Wetlands project is funded by the German Aerospace Center (DLR) with funds from the German Federal Ministry for Economic Affairs and Energy. Its goal is to demonstrate the potential of current remote sensing tools for supporting international initiatives and conventions by strengthening national capabilities for mapping and monitoring of w...

The impacts of agricultural expansion on wetlands are diverse and complex. Land surface temperature (LST) has a great potential to act as a global indicator of the status of wetlands and changes in their hydrological and evapotranspiration regimes, which are often linked to land use and cover changes. We use the whole MODIS LST archive (2000-2017)...

Wetlands are often coupled with human systems. That makes them highly dynamic cover types and thus difficult to map and monitor from space. The Sentinel-1 constellation allows us to monitor land changes regardless of cloud conditions and with a high frequency of pass. We used a time series of 33 Sentinel-1 dual pol images for 2016 to map changes in...

River discharge is a critical water cycle variable, as it integrates all the processes (e.g. runoff and evapotranspiration) occurring within a river basin and provides a hydrological output variable that can be readily measured. Its prediction is of invaluable help for many water-related tasks including water resources assessment and management, fl...

An overview of the GEO-Wetlands initiative which is part of the work programme of the Group on Earth Observations (GEO) and supports global users and stakeholders in using Earth Observation for wetland mapping, monitoring, inventorying and assessment.

Land Use Land Cover Change (LULCC) has a significant impact on water resources and ecosystems in sub-Saharan Africa (SSA). On the basis of three research projects we aim to describe and discuss the potential, uncertainties, synergies and science-policy interfaces of satellite-based integrated research for the Kilombero catchment, comprising one of...

Wetlands provide many essential ecosystem services, but at the same time they are threatened by processes like e.g. urbanization, expansion of farmland and extraction and pollution of freshwater. Due to their heterogeneous characteristics, spatiotemporal dynamics and topographic features, wetlands are often hard to identify, map and monitor, which...

n/a

Using Landsat 5 and Sentinel 2 imagery we produce LULC maps for three periods in time for the Kilombero Floodplain, in Tanzania. Maps show farm encroachment patterns that have taken place during the last 25 years. LULC change trends can be estimated from these maps. Combining the data with Sentinel-1 time series may be possible to distinguish other...

Automated monitoring systems that can capture wetlands' high spatial and temporal variability are essential for their management. SAR-based change detection approaches offer a great opportunity to enhance our understanding of complex and dynamic ecosystems. We test a recently-developed time series change detection approach (S1-omnibus) using Sentin...

Wetlands are hot spots of biodiversity and provide a wide range of valuable ecosystem services, but at the same time they globally are one of the fastest declining and most endangered ecosystems. The development of a Global Wetland Observation System (GWOS) that is supported by the Ramsar Convention on Wetlands since 2007 is seen as a step towards...

Wetlands are one of the fastest declining ecosystem types worldwide, while at the same time they are hot spots of biodiversity and provide diverse and valuable ecosystem services, such as water supply, hydrological buffering against floods and droughts, and climate regulation through carbon storage. Information on wetlands extent and their boundari...

Monitoring of long-term land-use and land-cover change patterns may be biased by seasonal changes of different surface properties (e.g. hydrology, phenology, etc.) which become even more prominent in highly dynamic ecosystems such as wetlands (Crews-Meyer, 2008; McClearly, Crews-Meyer and Young 2008; Dronova et al. 2011). These surface dynamics pro...

Land Surface Temperature (LST) has the potential to act as a continuous indicator of the ecological status of wetlands. Accurate emissivity values are required in order to calculate precise LST. We test two emissivity retrieval methods and their influence on LST calculated from a Landsat 7 image of a highly dynamic wetland in Southern Spain. LST ca...

Eine Analyse der Nutzungspotentiale des Global Earth Observation System of Systems (GEOSS) sowie der Group on Earth Observations (GEO) für deutsche Akteure, anhand mehrerer Fallbeispiele aus dem Bereich der Gewässerkunde.

Biogeochemical cycles, contaminant transport through the fluvial system and therefore water quality are strongly coupled to sediment fluxes. Coping with pressing global challenges and moving towards sustainable development therefore requires the availability of global sediment data, which is an important source of information for scientists, enviro...

River discharge is a critical water cycle variable, as it integrates all the processes (e.g. runoff and evapotranspira-tion) occurring within a river basin and provides a hydrological output variable that can be readily measured. Its prediction is of invaluable help for many water-related areas such as water resources assessment and management, as...

A short overview of existing global water quality monitoring programs such as GEMS/Water (UNEP) and national monitoring programs is given. Furthermore the role of water quality observations in the framework of GEOSS is highlighted. Which role plays sediment in those programs and monitoring systems? The talk also approaches the usage of Earth observ...

The effects of soil erosion on atmospheric carbon is governed by three key mechanisms that are i) the replacement of soil organic carbon (SOC) at eroding sites, ii) the mineralization of SOC during erosion and transport and iii) the stability of buried SOC at depositional sites. Markedly different assumptions have been made about the relative impor...

The effects of soil erosion on atmospheric carbon is governed by three key mechanisms that are i) the replacement of soil organic carbon (SOC) at eroding sites, ii) the mineralization of SOC during erosion and transport and iii) the stability of buried SOC at depositional sites. Markedly different assumptions have been made about the relative impor...