V.G. Jetten

V.G. Jetten
University of Twente | UT · Department of Earth Systems Analysis (ESA)

MSc, PhD

About

174
Publications
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6,851
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Publications

Publications (174)
Preprint
Full-text available
Different stakeholders are now looking for methods suitable for communicating the potential impacts of tropical cyclone (TC) associated rainfall and the subsequent flood hazard. We developed a new solution that utilizes GPM-IMERG satellite precipitation estimates to characterize TC rainfall spatial-temporal patterns and derives precipitation curves...
Article
Full-text available
Hazardous surface processes such as floods and mass movements are often induced by a common trigger such as extreme precipitation. The relationship between the intensity of the trigger and the surface hazard is generally assumed to be monotonically increasing (increasing precipitation never decreases hazard intensity). The validity of this assumpti...
Preprint
Full-text available
Urban flood hazard model needs rainfall with high spatial and temporal resolutions for flood hazard analysis to accurately simulate flood dynamics in complex urban environments. However, in many developing countries, such high-quality data is scarce. Data that exist are also spatially biased towards airports and urban areas in general, where these...
Article
Full-text available
Mass movements such as debris flows and landslides differ in behaviour due to their material properties and internal forces. Models employ generalized multi-phase flow equations to adaptively describe these complex flow types. Such models commonly assume unstructured and fragmented flow, where internal cohesive strength is insignificant. In this wo...
Chapter
Full-text available
Landslide is a common natural disaster occurring in Indonesia during the rainy season from November to February. Attempts have been made to develop an early warning system based on the rainfall derived from satellite observation. It is essential to verify the accuracy level of the rainfall threshold in predicting the occurrence of rainfall, causing...
Article
Conventional soil survey methods are labor intensive and prohibitively expensive considering the area to be covered. Unfortunately, the current soil survey products are not adequate, either categorically or cartographically, and cannot be easily downscaled for its application at farm-level. On the other hand soil is a continuous variable and does n...
Preprint
Full-text available
Mass movements such as debris flows and landslide differ in behavior due to their material properties and internal forces. Models employ generalized multi-phase flow equations to adaptively describe these complex flow types. However, models commonly assume unstructured and fragmented flow after initiation of movement. In this work, existing work on...
Thesis
Full-text available
Thailand has a long tradition of using detailed soil information in agriculture and watershed management. Agricultural extension workers locally named “ soil doctors ”, give advice on farm level on increasing agricultural production and combat land degradation. Unfortunately, detailed soil information is only available for the flat areas where most...
Article
Weathering-induced iron dissolution and precipitation in rock masses lead to reduction in shear strength of discontinuities, amongst others, while precipitation leads to an increase, and precipitated iron may reduce the susceptibility to future weathering. This effect is investigated in fieldwork campaigns with detailed rock mass characterization a...
Article
Full-text available
The 2008 Wenchuan earthquake in Sichuan, China, dramatically changed the terrain surface by inducing large numbers of landslides. Due to the lack of adequate pre- and post-earthquake Digital Elevation Models, the landslide volume estimation was done either using empirical area-volume relationships over large areas or by field surveys in a few catch...
Conference Paper
Full-text available
Severe flooding causes damage to properties, disruption of economic activities and loss of lives. In the Philippines flooding is of particular concern because it can affect heavily populated areas like Manila. Excessive rain is often the major cause but anthropogenic activities such as deforestation, land use changes, and urbanization also affect f...
Article
Full-text available
An operating geothermal power plant consists of installation units that work systematically in a network. The pipeline network connects various engineering structures, e.g. well pads, separator, scrubber, and power station, in the process of transferring geothermal fluids to generate electricity. Besides, a pipeline infrastructure also delivers the...
Article
Full-text available
Within hydrological models, flow approximations are commonly used to reduce computation time. The validity of these approximations is strongly determined by flow height, flow velocity and the spatial resolution of the model. In this presentation, the validity and performance of the kinematic, diffusive and dynamic flow approximations are investigat...
Article
Effect of soil erosion causing negative impact on ecosystem services and food security is well known. On the other hand there can be yearly variation of total precipitation received in an area, with the presence of extreme rains. To assess annual erosion rates various empirical models have been extensively used in all the climatic regions. While th...
Article
Full-text available
Urban growth may intensify local flooding problems. Understanding the spatially explicit flood consequences of possible future land cover patterns contributes to inform policy for mitigating these impacts. A cellular automata model has been coupled with the openLISEM integrated flood modeling tool to simulate scenarios of urban growth and their con...
Article
Full-text available
Remote sensing has shown its potential to assess soil properties and is a fast and non-destructive method for monitoring soil surface changes. In this paper, we monitor soil aggregate breakdown under natural conditions. From November 2014 to February 2015, images and weather data were collected on a daily basis from five soils susceptible to detach...
Article
Airborne gamma-ray imagery (AGRI) provides coarse-resolution (approximately 400 × 400 m pixel) spatial information on gamma-ray emitting elements, i.e. potassium (K), thorium (Th) and uranium (U), in the upper half meter of the soil. These radioelements are a potential information source for soil mapping since their abundance is related to soil geo...
Article
Full-text available
Large earthquakes in mountainous regions may trigger thousands of landslides, some active for years. We analysed the changes in landslide activity near the epicentre of the 2008 Wenchuan earthquake by generating five landslide inventories for different years through stereoscopic digital visual image interpretation. From May 2008 to April 2015, 660...
Research
Full-text available
The GITHRA project is a concerted, ambitious and unique attempt to build capacity on the application of modern Geo-IT for Hazard Risk Assessment (HRA) and Disaster Risk Reduction (DRR) and to develop a spatial multi-hazard risk assessment methodology applicable for Vietnam. Staff of the Vietnamese Ministry of Agriculture and Rural Development (MARD...
Article
Full-text available
Flash-flood is considered as one of the most common natural disasters in Grenada, a tropical small state island in Caribbean Island. Grenada has several areas which are susceptible to flooding. One of them is Gouyave town which is located in the north-west of Grenada. Its land-use types are highly dominated by green areas, especially in the upper-p...
Article
Full-text available
Flood type classification is an optimal tool to cluster floods with similar meteorological triggering conditions. Under climate change these flood types may change differently as well as new flood types develop. This paper presents a new methodology to classify flood types, particularly for use in climate change impact studies. A weather generator...
Article
Full-text available
Large earthquakes in mountainous regions may trigger thousands of landslides, some active for years. We analysed the changes in landslide activity near 2008 Wenchuan earthquake epicentre, generating five landslide inventories for different years through stereoscopic digital visual image interpretation. From May 2008 to April 2015, 660 new landslide...
Conference Paper
Full-text available
Effect of soil erosion causing negative impact on ecosystem services and food security is well known. To assess annual erosion rates various empirical models have been extensively used in all the climatic regions. While these models are simple to operate and do not require lot of input data, the effect of extreme rain is not taken into account in t...
Conference Paper
Full-text available
Effect of soil erosion causing negative impact on ecosystem services and food security is well known. To assess annual erosion rates various empirical models have been extensively used in all the climatic regions. While these models are simple to operate and do not require lot of input data, the effect of extreme rain is not taken into account in t...
Conference Paper
Full-text available
Since publication of the first Ecological Stides volume on biological soil crusts (biocrusts) in 2003, numerous studies have been conducted trying to understand the role of biocrusts in runoff generation and water erosion. Most of them considered these communities as one of the most important stabilizing factors dryland regions. However, these stud...
Article
Full-text available
Grenada is one of the susceptible areas to flooding. It is due to the high intensity of rainfall in each year and Grenada often hit by hurricanes and tropical storms. Flash-flood often occur in Grenada, specifically in two areas (Gouyave and St. John's watershed). Both of them have different characteristics. Gouyave watershed represents rural area,...
Article
Juwana Catchment and Logung Sub-catchment in particular has been suffering several major past flood events with significant loss. This study conducted an assessment of flood risk by using OpenLISEM as physical soil and hydrological model to generate the single storm flash flood occurrences. The physical input data were collected from remote sensing...
Conference Paper
This paper aims to provide insights into the design of a modeling process to explore urban growth and flood interactions in Kigali, Rwanda. Starting from the research objectives and available compiled data, initial decisions are taken on the modeling extent, the complexity of models and the quality of data (emphasizing building footprints of the ba...
Article
In dryland ecosystems, runoff is mainly generated in bare areas, which are also more susceptible to water erosion than vegetated areas. These bare areas are often covered and protected by biological soil crusts (BSCs), which modify numerous physicochemical surface properties involved in runoff and erosion processes. BSCs are considered as one of th...
Conference Paper
The use of urban growth modeling has been found useful in searching for strategies to improve flood risk management in Kampala, Uganda. However, to generalize the approach in the context of Sub-Saharan Africa, a deeper understanding of the modeling's implications is required. Building on a simple cellular automata model calibrated for Upper Lubigi...
Article
Landslides are the most frequent type of natural hazards that are often observed in hilly and mountainous areas. It may lead to not only loss of life but huge economic losses due to property damage, and other indirect effects such as disruption to transportation networks. These effects can be minimised and avoided if landslide prone areas are ident...
Technical Report
Full-text available
In the agreement (2005-2009) with the United Nations University the International Institute for Geo-information Science and Earth Observation (ITC) as Associated Institution assumed the responsibility of establishing a School on Disaster Geo-Information Management, and the dissemination of knowledge on this and directly related issues. After 2010,...
Article
Subsurface stormflow is thought to occur mainly in humid environments with steep terrains. However, in semi-arid areas, preferential flow through macropores can also result in a significant contribution of subsurface stormflow to catchment runoff for varying catchment conditions. Most hydrological models neglect this important subsurface preferenti...
Article
To assess the usability of satellite rainfall estimates for erosion studies in Cape Verde, the 3B42 and 3B43 products from TRMM, and the Multi-Sensor Precipitation Estimate MPE from Meteosat are compared to daily and monthly ground rainfall measured between 1998 and 2010. TRMM estimates from 1998 and MPE from 2009 were studied and it was found that...
Article
Full-text available
Soil organic carbon (SOC) constitutes a large pool within the global carbon cycle. Land use change significantly drives SOC stock variation. In tropical central and eastern Africa, how changes in land use and land cover impact on soil C stocks remains unclear. Variability in the existing data is typically explained by soil and climate factors with...
Article
Full-text available
It has become increasingly clear that desertification can only be tackled through amulti-disciplinary approach that not only involves scientists but also stakeholders. In the DESIRE project such an approach was taken. As a first step, a conceptual framework was developed inwhich the factors and processes thatmay lead to land degradation and deserti...
Article
Accurate runoff and soil erosion modeling is constrained by data availability, particularly for physically based models such as OpenLISEM that are data demanding, as the processes are calculated on a cell-by-cell basis. The first decision when using such models is to select mapping units that best reflect the spatial variability of the soil and hyd...
Article
Full-text available
The formation of mechanical discontinuities (i.e., bedding, joint planes) is one of the main effects of weathering in rock masses. It is also highly important for forecasting the geotechnical properties of a rock mass in the future. The effect is well known in most rock types, but the mechanisms of forming discontinuities and the resulting variatio...
Article
Erosion, in particular gully erosion, is a widespread problem. Its mapping is crucial for erosion monitoring and remediation of degraded areas. In addition, mapping of areas with high potential for future gully erosion can be used to assist prevention strategies. Good relations with topographic variables collected from the field are appropriate for...
Article
Erosivity, the potential of rainfall to detach soil particles, is a parameter used in several models to link rainfall and soil losses. Erosivity is usually calculated from high temporal resolution rainfall during a long period of time, and data is not always available. For Cape Verde, off the west coast of Africa, where data is limited, researchers...
Article
Cape Verde is a semi-arid country conformed by a group of islands located off the west coast of Africa, with highly variable rainfall that appears during a single rainy season. Santiago Island, the biggest of the country, is characterized for abrupt changes of relief within small distances. The influence of geographic location and topographic param...
Article
Erosion, in particular gully erosion, is a widespread problem. Its mapping is crucial for erosion monitoring and remediation of degraded areas. In addition, mapping of areas with high potential for future gully erosion can be used to assist prevention strategies. Good relations with topographic variables collected from the field are appropriate for...
Chapter
Full-text available
Earthquakes may trigger a series of multiple cascading geohazard phenomena. For example, coseismic landslides may block rivers and form landslide dams, which occur frequently in tectonically active mountains with narrow and steep valleys. The catastrophic release of water masses from landslide-impounded lakes is capable to produce outburst floods a...
Article
Full-text available
Quantitative landslide risk assessment requires information about the temporal, spatial and intensity probability of hazardous processes both regarding their initiation as well as their run-out. This is followed by an estimation of the physical consequences inflicted by the hazard, preferentially quantified in monetary values. For that purpose, det...
Article
The complexity of temporal and spatial changes of soil characteristics under shifting cultivation in the tropics and the expense of comprehensive data collection motivates the development of a minimum data set (MDS) for characterizing soil productivity status and potential. We define a multi-criteria quantitative procedure for MDS selection: (i) th...
Article
Full-text available
In many parts of the world debris flows are one of the most dangerous of all mass wasting events. Mountainous areas with high slope instability, high seismic activities and extreme rainfall condition are the main triggering factors. The Monday, May 12, 2008, mega-earthquake of magnitude 8.0 that struck the Wenchuan area, Northwestern Sichuan provin...
Conference Paper
Full-text available
This paper presents the result of research that has been done to develop quantitative factors for incorporation in the design of slopes to account for stress relief and weathering in humid tropical areas. The quantitative factor was developed by establishing the relationship between weathering intensity rate and exposure time for the intact rock st...
Article
Full-text available
Cut slopes in rock masses start to deteriorate directly after excavation due to stress relief and weathering. The deterioration is a time dependent process that depends on the local climate and the rock mass including its history, and the environment. The amount of deterioration per time unit (‘the weathering intensity rate’) is not a constant over...
Article
The Kagera Basin is a high value ecosystem in the Lake Victoria watershed because of the hydrological and food services it provides. The basin has faced large scale human induced land use and land cover changes (LUCC), but quantitative data is to date lacking. A combination of ancillary data and satellite imagery were interpreted to construct LUCC...
Article
Surface runoff and erosion represent major processes of pesticides transport from agricultural lands to aquatic ecosystems. Even if pesticide runoff models have been steadily improved in recent years, they remain only partially successful in correctly predicting pesticides transfers to surface waters. This could be partially explained by the limite...
Article
Full-text available
As Indonesia is the world's fourth most populous country, food security is a persistent challenge. The potential impact of future climate change on the agricultural sector needs to be addressed in order to allow early implementation of mitigation strategies. The complex island topography and local sea-land-air interactions cannot adequately be repr...
Conference Paper
Full-text available
Las costras biológicas del suelo (CBS) modifican numerosas propiedades de la superficie del suelo involucradas en los procesos de generación de escorrentía y erosión, hasta el punto de ser consideradas uno de los principales agentes protectores frente a la erosión en los sistemas áridos y semiáridos. Dado el importante papel protector que ejercen s...
Article
Landslide inventories prepared manually from remote sensing data or through field surveys have shown to be useful for preparation of landslide susceptibility and hazard maps. Recent literatures show several studies have been carried out to prepare landslide inventories from satellite data by automatic methods. However, almost no attempt has been ma...