Flag of Peru which joined Bolivia to form the Peru–Bolivian Confederation. The South was formed first, thus adopting a new flag: a red vertical band on the left, with a golden sun and four small stars above (representing Arequipa, Ayacucho, Cuzco and Puno, the four groups of the republic), and the right side divided into an upper green band and a lower white one. The North kept the currency and all ---- of the dissolved Peru, including its flag. The flag of the Peru-Bolivian Confederation showed the coats of arms of Bolivia, South and North Peru, from left to right and slanted at
Water resources management in Peru upper basins, whereas the southern part of the country is particularly prone to droughts. Aside from natural causes, such as El Niño Southern Oscillation, the effects of droughts and floods have been exacerbated by manmade interventions including soil erosion stemming from poor cropping and grazing practices, deforestation, and poor land use-practices. El Niño hits Peru approximately once every seven years and consists of heavy winds and rainfall associated with devastating floods and landslides. In 1997–1998 the costs of damages reached US$2 billion. Droughts severely affect the southern coast, producing agricultural losses as well as limitations on human water consumption. Preventive