Simone Giertz

Simone Giertz
University of Bonn | Uni Bonn ·  Department of Geography

Dr.

About

34
Publications
25,278
Reads
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899
Citations
Citations since 2016
8 Research Items
573 Citations
2016201720182019202020212022020406080
2016201720182019202020212022020406080
2016201720182019202020212022020406080
2016201720182019202020212022020406080
Introduction
Skills and Expertise

Publications

Publications (34)
Article
Full-text available
In this paper, we present and analyze a novel global database of soil infiltration measurements, the Soil Water Infiltration Global (SWIG) database. In total, 5023 infiltration curves were collected across all continents in the SWIG database. These data were either provided and quality checked by the scientists who performed the experiments or they...
Article
Full-text available
In this paper, we present and analyze a global database of soil infiltration measurements, the Soil Water Infiltration Global (SWIG) database, for the first time. In total, 5023 infiltration curves were collected across all continents in the SWIG database. These data were either provided and quality checked by the scientists who performed the exper...
Preprint
Full-text available
Download Abstract In this paper, we present and analyze a global database of soil infiltration measurements, the Soil Water Infiltration Global (SWIG) database, for the first time. In total, 5023 infiltration curves were collected across all continents in the SWIG database. These data were either provided and quality checked by the scientists who...
Article
Full-text available
This study assesses the impact of climate change on hydrological processes under rice intensification in three headwater inland valley watersheds characterized by different land conditions. The Soil and Water Assessment Tool was used to simulate the combined impacts of two land use scenarios defined as converting 25% and 75% of lowland savannah int...
Article
Achieving sustainable agricultural intensification in inland valleys while limiting the impacts on water quantity and water quality requires a better understanding of the valleys’ hydrological behavior with respect to their contributing watersheds. This study aims at assessing the dynamics of hydrological processes and nitrate loads within inland v...
Article
The selection of optimal areas for specific cultivation systems is an important step in achieving increased, sustainable rice production in Benin. This study aims to determine suitable areas for rice production in the inland valley of Tossahou using a GIS-based approach that evaluates and combines biophysical factors such as climate, hydrology, soi...
Article
Assessment studies of N and P loads to water systems have developed from simple descriptions based on monitoring and sampling into the analysis of multiple scenarios using simulation models. In this study, water, sediment, and nutrient delivery to the stream flow at the Donga-Pont river catchment outlet (586 km2) in the Republic of Benin, West Afri...
Article
Full-text available
This paper assesses the current use and constraints on the use of inland valleys in central Benin are assessed to analyse their agro-potential. The methodology applied in this study is comprised of a survey of local authorities and inland valley users conducted with standardised questionnaires and the mapping of inland valley surfaces with GPS. The...
Chapter
Full-text available
Today, fresh water has already become a critically scarce resource in many regions of the world. In many developing countries insufficient water supply infrastructure aggravates this problem. With the ongoing global change and population growth water security will become one of the major problems in the 21st century. Regarding the annual water bala...
Article
In the past 50 years, West Africa has experienced large land-use changes including deforestation, overgrazing and land reclamation. Land use change may have both immediate and long-lasting impacts on hydrological processes and the local and regional water balance. With the ongoing population growth and socio-economic problems in the region this lan...
Article
Full-text available
In Benin, annual water availability per capita far exceeds the critical threshold of about 1,700m3, but during the dry season, water scarcity occurs at the local scale. By modeling the water balance of the Ouémé–Bonou catchment with WEAP (Water Evaluation and Planning System), this study aimed at analyzing Benin’s future water situation under diffe...
Chapter
Full-text available
Water availability is subject to high temporal variations in Benin due to the natural inter-annual sequence of the rainy and dry seasons. Even if physical water scarcity does not appear to represent the most important limiting factor, access to water in some parts of the Ouémé catchment is constrained by the low economic capacities of suppliers and...
Chapter
Full-text available
Hydro-meteorological measurement concepts for the semi-humid tropical climate of the Ouémé catchment are described. Meteorological stations have been deployed for multiple reasons: (a) to improve assessments of the water balance in the Upper Ouémé catchment; (b) to study precipitating weather systems; and (c) to understand high-impact weather syste...
Article
In Benin, annual water availability per capita far exceeds the critical threshold of about 1,700 m 3 , but during the dry season, water scarcity occurs at the local scale. By modeling the water balance of the Ouémé–Bonou catchment with WEAP (Water Evaluation and Planning System), this study aimed at analyzing Benin's future water situation under di...
Article
Full-text available
Obwohl Benin nicht zu den Ländern zählt, die von physischem Wassermangel betroffen sind, entstehen während derTrockenzeit Ver-sorgungslücken. Studien haben zudem gezeigt, dass vor allem die ländliche Bevölkerung des Landes nicht ausreichend mit Wasser versorgt wird. Im Zuge der zu erwartenden klimatischen Veränderung ist eine Bewertung der national...
Chapter
Full-text available
This paper analyses the major features of spatially explicit and lumped hydro-logical models based on two case studies. For two different catchments in West Africa and Germany model intercomparison studies were performed to reveal the model structure and spatial resolution dependent advantages and disadvantages of the different model types. It can...
Article
Full-text available
Regional climate models that take into account land-use changes indicate that in the future, a general decrease in rainfall, together with prominent surface heating, can be expected for sub-Saharan Africa and the region north of the Sahara until 2050. Due to high population growth, land use changes rapidly and influences water availability and wate...
Article
Full-text available
The aim of the study was to test the applicability of a physically-based model to simulate the hydrological processes in a headwater catchment in Benin. Field investigations in the catchment have shown that lateral processes such as surface runoff and interflow are most important. Therefore, the 1-D SVAT-model SIMULAT was modified to a semi-distrib...
Article
Full-text available
This paper presents a software development approach to customize the GIS software ArcGIS (by ESRI) for spatial decision support. For the case study, example data of the Queme catchment in Benin (Africa) is used to program such a system which will be used to plan the establishment of potential small water reservoirs. Therefore, a new user menu in Ar...
Article
Full-text available
This paper presents an interdisciplinary scenario analysis to assess the influence of global and regional change on future water availability and water consumption in the Upper Ouémé catchment in central Benin. For the region three development scenarios were evolved. These scenarios are combined with climate change scenarios based on the IPCC (Inte...
Article
Land use is a key parameter in the hydrologic cycle. Tropical Africa is affected by intense land use change since decades, particularly deforestation and conversion to agricultural land. The aim of this study is to analyse the effects of land use change on the hydrologic processes and soil physical properties in a small catchment (Aguima catchment)...
Article
Full-text available
This paper presents the concept, first results and perspectives of the hydrological sub-project of the IMPETUS-Benin project which is part of the GLOWA program funded by the German ministry of education and research. In addition to the research concept, first results on field hydrology, pedology, hydrogeology and hydrological modelling are presente...
Conference Paper
Full-text available
Different model concepts are applied at different scales to simulate local to regional water fluxes of the tropical Ouémé watershed in central Benin (West Africa). They contain different levels of hydrological process knowledge (process-based vs conceptual, distributed vs lumped) and require different quality and resolution of data. Process-based m...
Article
This paper analyzes the hydrological processes and the impact of soil properties and land use on these processes in tropical headwater catchment in the sub-humid part of Benin (West-Africa), the Aguima catchment. The presented study is integrated in the GLOWA IMPETUS project, which investigates the effects of global change on the water cycle and wa...
Article
In order to examine the regional water balance and the water dynamic using hydrological models the dominant runoff generation processes and its influencing factors have to be understood. This is a pre-requisite to be able to forecast the effects which global change has on hydrological processes and water availability Therefore, the aim of this stud...
Data
This paper analyzes the hydrological processes and the impact of soil properties and land use on these processes in tropical headwater catchment in the sub-humid part of Benin (West-Africa), the Aguima catchment. The presented study is integrated in the GLOWA IMPETUS project, which investigates the effects of global change on the water cycle and wa...
Article
The presented study is integrated in the GLOWA IMPETUS project (an integrated ap- proach to the efficient management of scarce water resources in West Africa) which analyses the effects of global change conditions on regional hydrological processes and on the water availability in Benin and Morocco. To examine the hydrological cy- cle and its chang...
Article
Full-text available
Using a multi-level approach, this study aims to analyse the current and future agro-potential of the inland valleys in the Upper Ouémé catchment of central Benin. As no sufficient inland valley database was previously available for Benin, a detailed field survey of physical and socio-economic properties of inland valleys was carried out. This was...

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