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… of the functions they perform in the hydrological and chemical cycles.17 In addition to these products and … are of great importance since organic (sewage) and toxic (chemical and industrial) sediments are usually the major … may be modified through different types of hydraulic engineering projects. Wetland area may also be lost through …

… wetlands created by dams, barrages, or other civil engineering works carried out by governments or with … point of view (that is, their structure, physical and chemical properties, as well as the animal and plant life … ecosystem were defined as “those physical, biological or chemical components such as soil, water, plants, animals and …

… ecosystem” are defined as “those physical, biological or chemical components, such as soil, water, plants, animals and … leading to serious environmental damage, including chemical pollution, salinization and exhaustion of aquifers; … including agricultural, industrial, mining and hydraulic engineering, and should where appropriate include an …