RIVERS AND FLASHINESS

What causes rivers to be 'flashy', why don't all rivers display this characteristic and discuss how climate change could affect flashiness?

What causes rivers to be flashy, why don't all rivers display this characteristic and discuss how climate change could affect flashiness?

Introduction

Flashiness is a term which is related to stream flows and reflect the rapidity as well as frequencies that are related to number of changes in the stream flow. It is one of the most important components of 'stream's hydrologic system'. Different varieties of land management changes results in either 'increased' or 'decreased' flashiness, which portrays the negative impact on the marine life. (Stanford,2006,391)

It has been noticed that in explaining ecological communities the natural variability in river flows performs an important role .It has been also noticed that River flows differ from time to time for example from day, month, year and decades on multiple temporal scales. Understanding the reasons for the change in flow in the basin subdaily large stream may announce plans for water management that aim to advance environmental conditions downstream of dams. The potential benefits of low-flow fluctuations subdaily arrays observed for unregulated rivers include greater abundance and diversity of fish and aquatic invertebrates. Pico hydro operations continued decline of habitats in shallow water, which reduced a large number of young fish of the year and the change in community composition.

Community of freshwater mussels are often closely related to the density of fish host and the host fish species were found in habitats in shallow water and slowly more affected by changes in a short time in power.(Bales,2009,91)

Fluctuations also reduce the production of benthic invertebrates in Varial zone, an important food source for freshwater fish, and can reduce the number or diversity of invertebrates river. Two rare species of tiger beetle, Puritan Tiger Tiger Beetle and sidewalks in these habitats along the shores of the Connecticut River and some tributaries. The increase in short-term fluctuations in the flow downstream of hydroelectric dams in the basin of the Connecticut River were losing stable blocks and sandy beaches, environment and food for the larvae of beetles Mature tiger. (Stanford,2006,391) More remote rivers varies subdaily fluctuations may be no fish and low diversity of macro-invertebrates, which are replaced by taxa resistant to shocks, as seen from the many rivers fed by glaciers.(Graf, 2006, 1)

Alter the typical flow in a period of days to a few hours and seasons and years. Convention for the variety called bandwidth. System factors such as stream size and oftenness floods and periods of low flow, the incident of the season at various rates, exchange rates and flows oftenness reverse current. The drainage system has some impact on the physical and chemical environment of the current and, consequently, the biological communities that inhabit the rivers. "

The current system reflects the hydrological cycle in the pool. Climate, topography, geology, soil, vegetation, watershed size and shape, the current agreement, land, water and extract the influence of time and resources action of water and filtered ...