WATER QUALITY MODELLING OF RIVERS IN HILLY REGION

Autor:	M. R. Sharma, J. K. Bassin, A. B. Gupta
Rok vydání:	2009
Předmět:	Fluid Flow and Transfer Processes Hydrology Environmental Engineering Frequent falls Environmental science Algal growth Water quality modelling Water quality River water River bed Water Science and Technology Civil and Structural Engineering
Zdroj:	ISH Journal of Hydraulic Engineering. 15:1-10
ISSN:	2164-3040 0971-5010
DOI:	10.1080/09715010.2009.10514955
Popis:	Rivers in hilly region are generally swift fast moving, steep and varying slopes, shallow depth and narrow as compared to rivers in plain regions. They are typically characterized by the presence of water falls of small to medium height, the algal growth attached to river bed stones, and small deeper pools formed in the course of river, which affect the rate kinetics of river. Thus, in these rivers significant re-aeration is caused by frequent falls and turbulence created by bed-stones; algal growth on bed-stones causes large diurnal DO variations; pools formed in the river course act as oxidation ponds which remove significant BOD and formation of thick biological slime layer on the stones and rocks at the bed in the more polluted stretches. The widely used 1-dimensional river water quality models such as QUAL2e and STREAM do not explicitly simulate these processes with the result that these models become less useful for modelling such rivers. Application of a simple 1-D water quality model was ...
Databáze:	OpenAIRE
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