MONTHLY AVERAGE FLOW IN RÂUL NEGRU HYDROGRAPHIC BASIN

• Main Author: VIGH MELINDA
• Format: Article
• Language: English
• Published: Cluj University Press 2014-03-01
• Series: Aerul şi Apa: Componente ale Mediului
• Subjects: monthly average flow; space-time variation; flow principles; occurrence frequency; variation coefficient
• Online Access: http://aerapa.conference.ubbcluj.ro/2014/PDF/38-Vigh%20M.pdf

Râul Negru hydrographic basin represents a well individualised and relatively homogenous physical-geographical unity from Braşov Depression. The flow is controlled by six hydrometric stations placed on the main collector and on two of the most powerful tributaries. Our analysis period is represented by the last 25 years (1988 - 2012) and it’s acceptable for make pertinent conclusions. The maximum discharge month is April, that it’s placed in the high flow period: March – June. Minimum discharges appear in November - because of the lack of pluvial precipitations; in January because of high solid precipitations and because of water volume retention in ice. Extreme discharge frequencies vary according to their position: in the mountain area – small basin surface; into a depression – high basin surface. Variation coefficients point out very similar variation principles, showing a relative homogeneity of flow processes.