Water Quality Modelling for Nitrate Nitrogen Control Using HEC-RAS: Case Study of Nakdong River in South Korea

The World Health Organization (WHO) and the U.S. Environmental Protection Agency (EPA) provide guidelines on the maximum levels of nitrate nitrogen (NO3-N) contained in drinking water since excess nitrate ingestion may harm human health. Thus, monitoring and controlling the NO3-N concentration is of paramount importance, especially in sources of...

Flash floods in Cebu: monitoring, modelling and preventing

Flash floods are a damaging and recurring problem in Cebu city, Philippines. Very little data is known about the intensities and precipitation amounts and the resulting river discharges. This research project firstly aims to gather as much data as possible on precipitation and river discharges that could cause the floods, it focuses on a small...

Preliminary design of a flood abatement control zone (ZAC) in the region of Murcia, Spain

The coastal area of the Murcia region in Spain experiences more frequent and more intense flash floods caused by inland heavy rainfall due to climate change. This results in high water levels in towns and cities, leading to risk of loss of life and many financial damages. Currently the region is vulnerable, because there are no hydraulic...

Exploring sustainable sand-winning in the White Volta: Estimating transient storage upstream of run-of-river weirs for sand winning purposes via hec-ras 6, 1-d, flume models

This research aims to explore sediment transport behavior and accumulation caused by run-of-river weirs in order to examine there feasibility for sustainable sediment mining purposes in the White Volta River. Weirs are used to raise water levels up-stream to increase water levels and storage, but their is little information regarding sediment...

Hydraulic modelling of the Rambla de la Carrasquilla

In the southeast of Spain heavy storms can occur in the late summer and early autumn, during which great amounts of rain pours down. During a storm that took place in September 2019, over 300 mil- limetres of rain fell in just five hours. Throughout the 2019 flooding event, the Rambla de la Carrasquilla has overflowed its banks and the adjacent...

Flood Inundation Modeling by Integrating HEC–RAS and Satellite Imagery: A Case Study of the Indus River Basin

Floods are brutal, catastrophic natural hazards which affect most human beings in terms of economy and life loss, especially in the large river basins worldwide. The Indus River basin is considered as one of the world’s large river basins, comprising several major tributaries, and has experienced severe floods in its history. There is currently...

Identifying Modelling Issues through the Use of an Open Real-World Flood Dataset

The present work deals with the reconstruction of the flood wave that hit Mandra town (Athens, Greece) on 15 November 2017, using the framework of forensic hydrology. The flash flood event was caused by a huge storm event with a high level of spatial and temporal variability, which was part of the Medicane Numa-Zenon. The reconstruction...

Hydraulic Modelling of the Irrigation System of Medieval Basrah

Ancient Basrah has been the center of anthropological research studies due to its significance in the development of the culture, politics and economics of the region at the time. Agriculture was one of the main income revenues for ancient Basrah even though it received only an average of 60mm of rainfall per year, indicating a large reliance on...

River system behaviour along the river IJssel

This master thesis is about the positive effects of river system behaviour along the river IJssel. Due to failure of the flood defences along the IJssel, the protected areas will flood and water will flow out of the river. The discharge in the river will decrease and thus the water level at the downstream ends of the river will also decrease....

Assessing the impact of plastic waste accumulation on flood events with citizen observations: A case study in Kumasi, Ghana

This research assesses the impact of plastic waste accumulation on flood events with citizen observations in Kumasi, Ghana. In Kumasi, the fastest growing city in Ghana, flooding events have become more intense due to rapid urbanisation and land use intensification. Additionally, rapid population growth, urbanisation and lack of organised waste...

Comparing floodplain evolution in channelized and unchannelized urban watersheds in Houston, Texas

In this study, we compare the ability of two riverine flood control approaches: channelization and stream preservation/setbacks, to alleviate the adverse impacts of rapid urbanization. To study the effects of structural intervention and urban development on the evolution of the floodplain, we have chosen two neighboring urban watersheds in...

Performance of Models for Flash Flood Warning and Hazard Assessment: The 2015 Kali Gandaki Landslide Dam Breach in Nepal

The 2015 magnitude 7.8 Gorkha earthquake and its aftershocks weakened mountain slopes in Nepal. Co- and postseismic landsliding and the formation of landslide-dammed lakes along steeply dissected valleys were widespread, among them a landslide that dammed the Kali Gandaki River. Overtopping of the landslide dam resulted in a flash flood...

Project Ladysmith

Ladysmith, a small city in KwaZulu-Natal (South Africa) had to deal with severe floods in the past. To prevent the city against floods like this, the Ladysmith Flood Protection Scheme was implemented in 1998. After the implementation of this scheme, there were still some floods. The goal of this project is to identify the causes of the floods...

Analysis of drainage system in Georgetown, Guyana

In 2015 Georgetown, Guyana suffered from major flooding due to heavy rainfall. The use of a centuries-old agricultural drainage system for the urban drainage of the largest urbanized area of Guyana, poses problems considering flood safety. In 2016 a report was published by a ‘Dutch Risk Reduction Team’ (DRR Team) with recommendations on how to...

Multi-criteria approach to the infrastructural problems of San Pedro de la Paz - From an urbanistic and hydraulic perspective

Part I concerns the analysis of the infrastructural problems at hand in San Pedro de la Paz. To get insight into the problems first an analysis of the location is made. This analysis involves the geographical characteristics of the city, historical development, land use, infrastructure etc. Based on this analysis a problem description is made....