Modeling of the Dissolved Oxygen in a River with Storage Zone on the Banks

Abstract

The prediction of water quality in terms of variables like dissolved oxygen (DO), biochemical oxygen demand (BOD), pH value, total dissolved solids (TDS) and salinity etc. is useful for evaluating the use of water for various related purposes. The widely used Streeter and Phelps models for computing biochemical oxygen demand and its impact on dissolved oxygen do not account for the settleable component of BOD and related implications. The model also does not account for the impact of storage zone on the stream's DO. In the present work an attempt is made to develop a model which simultaneously accounts for the settleable component of BOD and the effect of storage zones on river's DO. An application of the model to real field data suggests that the cumulative impact of settleable BOD and presence of storage zone in the river is to shift the critical deficit closer to the point source and magnify its amount.

Real-time assessment of the Ganga river during pandemic COVID-19 and predictive data modeling by machine learning

“…Jha et al ( 2007 ) applied Streeter Phelps models for analyzing one of the most polluted rivers in India, i.e., the river Kali and showed the negative outcome with under and over-prediction. Kaushik et al ( 2012 ) modified Streeter Phelps model by considering the settle able component of BOD and the effect of storage zones on river’s DO. Authors found that the modified model was able to predict parameters of rivers more accurately.…”

Aproveitamento da água residual do processamento do pescado em irrigação

“…Com isso, se houver a liberação direta no solo, podem ocorrer danos à germinação e ao crescimento de plantas, em decorrência do estresse osmótico e da interferência negativa na absorção de água (EDELSTEIN et al, 2005;NEGRÃO et al, 2017;KODIKARA et al, 2018 Como mostra a sequência hierárquica, a redução dos resíduos é a prática mais correta (CALVO et al, 2014;COLE et al, 2014;USEPA, 2017;KING et al, 2006…”

“…Em um processamento ideal, a redução dos resíduos é considerada o procedimento mais correto e de maior contribuição para a sustentabilidade (CALVO et al, 2014;COLE et al, 2014;USEPA, 2017;KING et al, 2006. ) No entanto, isso nem sempre é possível, pois a correta lavagem de recipientes e da matéria prima é obrigatória, a fim de se garantir um produto final baseado em parâmetros microbiológicos determinados pela legislação vigente (CHOUWDHURY et al, 2010).…”