This article is the second in a series based on the project, ‘HULL GREEN AND BLUE INFRASTRUCTURE’ developed by post-graduate student MARJAN MASOUDI who has a civil engineering degree. This project is work produced as part of a taught module on the MA LANDSCAPE + URBANISM here at Kingston University. This section focuses on a sediment strategy for the project. To view the first in the series – HULL GREEN AND BLUE INFRASTRUCTURE: Marjan Masoudi – MA Landscape + Urbanism, Kingston University – further posts over the next few weeks will focus on the design strategy.
The four key principles aims of the proposal are:
- SUDS, Reduce flood risk by providing natural ways to collect and transfer water, such as permeable paving, water storage in rain gardens, swales and reed beds
- Improve water quality which will be released to the rivers
- Delivering biodiversity benefits by creating wetlands habitat for wild life
- Provide green space connection for residents.
The design proposal for Hull refers to a dynamic strategy that provides new green space and landscape processes through ecological and economical experimentation.
Sediment as a barrier for fishes is considered as disadvantage. However, the proposal creates benefit for biodiversity and residents by using sediment as cheap, easy maintain and unique identity by the river.
The diagrams show the changing geomorphology of the Humber River. Deposit and erosion of sediments over time have created a unique sedimentary river bank side along the Humber River. The Humber’s original width at the mouth of 25km in 18th century is now reduced by two third to only 8km. Most of this accretion has been caused by the nature processes of siltation. Source: Somerville & Gran, 1987
This proposal would expand habitat and increase biodiversity which would improve the function of the site. Wetland as well as a part of flood control system will create new landscape. Gabion blocks can be used to protect the “toe’ of vertical banks and provide habitat for local birds like ‘voles, fry and king fishers’. Structural materials are used to provide support for plants and shrubs to take root within new wetland -plant roots absorb pollutants from rain water which will be released to the river – thus reducing soil erosion and at the same time controlling sediment input to the river. Source: Aquino, Gerdo(2011), Landscape Infrastructure: Case Studies by SWA, Basel: BIRKHAUSER
With a set of strategies for sediment accretion, new habitat can emerge or become a means of economic and environmental growth. The diagram below illustrates the variety of local and migrant of species such as common reed, codes, knot or grey seal.
Source: Kingston upon Hull City Council, 2010