Stormwater management is an indispensible service throughout urban areas due to the high proportion of impervious land cover. Land cover is impervious when water cannot infiltrate into the ground; examples of this are asphalt, cement, and roofs, all common in urban areas. Stormwater management systems direct concentrated runoff during rainfall from impervious land to streams and rivers to avoid flooding. Additional strategies to avoid flooding, such as rooftop gardens and pervious cement, are used at present. These additional strategies are important in protecting urban river systems from... [+] Read more
Bawden wants to establish that the hedgehog population is plummeting due to urban development and the rising number of badgers in Britain. According to a national survey, the hedgehog population has decreased by 50% in 15 years. Over the same period, the hedgehog population in rural areas has decreased by a third.
Their habitats are being threatened by urban development as well as the choice of placing fences around gardens, thus shutting them out. In rural areas, the intensification of agriculture is reducing the amount of grasslands and hedgerows where hedgehogs live. According to the... [+] Read more