Biological As oxidation during start-up of rapid sand filters

Determination of optimal separation well distance for single borehole ATES systems, in the Netherlands, implementing an an axi-symmetric numerical model

Aquifer thermal energy storage (ATES) is a growing technology in the Netherlands. There are two kinds of ATES configurations the doublet and the single borehole ATES (SB-ATES) layout. The limited subsurface space in combination with the lower construction cost and the lower performance of the SB-ATES lead to the need to optimize their design....

An upscaling method for top-systems with layered heterogeneity and vertical anisotropy

The subsurface in the Western part of the Netherlands is generally characterized as a regional aquifer, in which most of the lateral groundwater flow takes place, covered by a semi-permeable layer. The semi-permeable layer is often split into a phreatic layer on top of an aquitard (which has an even lower permeability). The phreatic layer and...

Subsurface Freshwater Storage & Recovery In Artificial Islands: Case Study of Pluit City Land Reclamation Jakarta, Indonesia

This research seeks to discover the possibilities of Artificial Storage and Recovery (ASR) in an artificial urban island in Jakarta, to increase water security and provide a sustainable water supply.

Fate and Transport of Nutrients in Groundwater and Surface Water in an Urban Slum Catchment Kampala, Uganda

This study investigates the generation, transport and fate of sanitation-related nutrients in groundwater and surface water in an urban slum area in sub-Saharan Africa. In excess, nutrients can cause eutrophication of downstream water bodies. The study argues that nitrogen-containing rains and domestic wastewater from slum areas were important...

Groundwater modelling of the khettara area of Fezna-Jorf-Hannabou, Morocco

This master thesis comprehends a study on khettaras, historical subsurface drainage tunnels, in East Morocco. A numerical groundwater model was set up to simulate these systems and to get a better understanding of their behaviour. Subsequently, the model was used to simulate the effect of several scenarios: increased use of pumped wells in the...

Modelling ungauged lowland basins: Does complementary groundwater data add value to topography driven conceptual modelling?

A common practice for hydrologists to determine the performance of a hydrological model and its parameter values, is by calibrating the model parameters on observed discharge data, but this data is not always available. For this reason, other data should be used as complementary data in order to reduce the uncertainty of outflow and processes in...

Water Law and Organization (Dutch version)

Lecture notes in DUTCH for course CIE5500, providing a detailed overview of Dutch and European water law concerning surface and groundwater, the North Sea and the Wadden Sea, water services, flood protection, spatial planning, nature protection, water management organizations (e.g. the water boards), financing and legal protection....

Sustainable conjunctive use of surface and groundwater: Modeling on the basin scale

Farmers in the Indus basin, Pakistan have generally switched to groundwater for additional water supplies due to the irregular supply of irrigation water; currently over 50% of the agricultural land in the basin is at least partially irrigated by tube-wells. These wells pump fresh groundwater, which essentially is the result of massive leakage...

Groundwater flow through anisotropic fault zones in multiaquifer systems

Vertical faults through the shallow crust are commonly believed to act as either barriers to horizontal groundwater flow normal to the fault, conduits to horizontal flow tangential to the fault, or a combination of both. In addition, enhanced vertical permeability has been identified as a common feature. We investigate the effects of vertical...

Fiber optics opens window on stream dynamics

A new approach to monitoring surface waters using distributed fiber optic temperature sensing is presented, allowing resolutions of temperature of 0.01°C every meter along a fiber optic cable of up to 10,000 m in length. We illustrate the potential of this approach by quantifying both stream temperature dynamics and groundwater inflows to the...

Introduction to special section on Uncertainty Assessment in Surface and Subsurface Hydrology: An overview of issues and challenges

This paper introduces the Water Resources Research special section on Uncertainty Assessment in Surface and Subsurface Hydrology. Over the past years, hydrological literature has seen a large increase in the number of papers dealing with uncertainty. In this article, we present an overview of the different sources of uncertainty and the...