01959naa a2200325 a 450000100080000000500110000800800410001910000180006024500620007826000090014030000150014950000500016452009940021465000200120865000160122865000140124465000150125865000160127365300190128965300210130865300240132965300210135365300250137470000180139970000190141770000160143670000200145270000140147277301470148620399722017-05-16       2016    bl uuuu     u00u1 u    #d1 aASSINE, M. L.  aAvulsive rivers in the hydrology of the Pantanal wetland.  c2016  ap. 83-110.  a(The Handbook of Environmental Chemistry, 37)  aThis chapter presents and discusses the avulsive nature of the Pantanal rivers and shows how the ever-changing drainage network influences the surface hydrology and ecology. Besides, the systemic portrait here outlined provides new insights concerning the Pantanal hydrodynamics, in its particularities and as a whole system. A simple model of the avulsion process is illustrated, and several realistic examples of the processes leading to river avulsions are shown and discussed. The north-to-south flood-pulse wave due to the presence of bottlenecks is further described in detail. This systemic approach allows identifying that the fluvial ?avulsive and bottleneck? dynamics seasonally affects both local and regional ecohydrological processes. Moreover, it shows that avulsive processes are commonplace in Pantanal, and changes in land use, particularly in river headwaters in the highlands, accelerate the avulsions, making the sustainable use of the Pantanal lowland areas difficult.  aAlluvial plains  aFloodplains  aHydrology  aHidrologia  aInundação  aFlood dynamics  aFluvial avulsion  aFluvial bottlenecks  aFluvial megafans  aMultichannel systems1 aMACEDO, H. A.1 aSTEVAUX, J. C.1 aBERGIER, I.1 aPADOVANI, C. R.1 aSILVA, A.  tIn: BERGIER, I.; ASSINE, M. L. (Ed.). Dynamics of the Pantanal Wetland in South America. Switzerland: Springer International Publishing, 2016.