Browsing All Posts filed under »urbanisation«

Urban trees protect local water bodies

September 25, 2017

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As a result of nutrient transfer from the land, urban waterways often have high concentrations of nitrogen and phosphorus, which can lead to algal blooms, low water clarity, oxygen depletion and species loss. Nutrient enrichment problems also extend to urban groundwater, where water quality can be compromised.  Although nutrients moving from land to groundwater water […]

Dealing with river complexity

March 27, 2017

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Hydromorphology is a relatively new field that deals with the structure of hydrological systems and changes in their form over time. Many such changes are influenced by human-induced pressures. Realistic attempts to conceptualize hydromorphological forms and processes reflect the fact that rivers are complex multidimensional systems with longitudinal, lateral, vertical and temporal components, as well […]

Volunteers collect high quality data

June 1, 2016

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Volunteer community groups are increasingly active in environmental monitoring, and often have the capacity to collect large amounts of data that can potentially complement or replace information gathered by management agencies. However, in some instances, scientists have expressed reservations about the reliability of community-generated data. New Zealand researchers compared the level of agreement between stream […]

Green covers improve drainage channels

June 1, 2016

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In urban environments, the ubiquity of impervious surfaces increases rainfall runoff and the risk of flash flooding. These problems can be addressed by widening and deepening drainage canals, but usually at the risk of further habitat degradation. As a result, there ‘s increasing interest in low-impact environmentally-sensitive designs that simultaneously improve flood control and ecosystem […]

Inequity creates a water crisis

December 18, 2015

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Lake Urmia, in western Iran, is a Ramsar-listed Biosphere Reserve and one of the world’s most significant salt lakes. Until recent times it had a length of 140 km. However, its size has been reduced by 90% as a result of forest destruction and short-sighted water policies. A recently-published case study of Lake Urmia offers […]

Applying the ecosystem services approach to land use planning

July 20, 2015

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Rivers and lakes contribute a wide variety of ecosystem services, including water supply, habitat provision, flood protection and recreational opportunities. However, methods of evaluating ecosystem services and integrating those values into aquatic management are still relatively new and continue to evolve. A framework for incorporating the aquatic ecosystem services approach into urban planning has been […]

Runoff in the suburbs

March 23, 2015

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The ubiquity of impermeable surfaces in urban environments means that relationships between rainfall and runoff in built-up areas are very different from those in rural catchments. While a lot of hydrological research has been carried in both urban and rural environments, much less is known about rainfall-runoff relationships in suburban areas, and the relevance of […]