Side-by-side comparison of horizontal subsurface flow and free water surface flow constructed wetlands and artificial neural network (ANN) modelling approach

2009 ◽  
Vol 35 (8) ◽  
pp. 1255-1263 ◽  
Author(s):  
Muhsin Naz ◽  
Sinan Uyanik ◽  
M. Irfan Yesilnacar ◽  
Erkan Sahinkaya
Keyword(s):  
Neural Network ◽  
Artificial Neural Network ◽  
Constructed Wetlands ◽  
Water Surface ◽  
Subsurface Flow ◽  
Free Water ◽  
Surface Flow ◽  
Artificial Neural Network Ann ◽  
Surface Flow Constructed Wetlands ◽  
Modelling Approach

scholarly journals Estimation of Solar Radiation using Artificial Neural Network

2004 ◽  
Vol 18 (1) ◽  
Author(s):  
Slamet Suprayogi
Keyword(s):  
Neural Network ◽  
Artificial Neural Network ◽  
Solar Radiation ◽  
Water Surface ◽  
Artificial Neural ◽  
Artificial Neural Network Ann

The solar radiation is the most important fator affeccting evapotranspiration, the mechanism of transporting the vapor from the water surface has also a great effect. The main objectives of this study were to investigate the potential of using Artificial Neural Network (ANN) to predict solar radiation related to temperature. The three-layer backpropagation were developed, trained, and tested to forecast solar radiation for Ciriung sub Cachment. Result revealed that the ANN were able to well learn the events they were trained to recognize. Moreover, they were capable of effecctively generalize their training by predicting solar radiation for sets unseen cases.

Use of constructed wetlands in water pollution control: historical development, present status, and future perspectives

1994 ◽  
Vol 30 (8) ◽  
pp. 209-223 ◽  
Author(s):  
Hans Brix
Keyword(s):  
Water Pollution ◽  
Constructed Wetlands ◽  
Pollution Control ◽  
Historical Development ◽  
Water Surface ◽  
Subsurface Flow ◽  
Free Water ◽  
Water Pollution Control ◽  
Free Water Surface ◽  
Flow Systems

During the last two decades the multiple functions and values of wetlands have been recognized not only by the scientists and managers working with wetlands, but also by the public. The ability of wetlands to transform and store organic matter has been exploited in constructed wetlands. This paper summarizes the state-of-the-art of the uses of constructed wetlands in water pollution control by reviewing the basics of the technology, the historical development, and the performance expectations with focus on the use of free water surface and subsurface flow constructed wetlands for municipal wastewater treatment. Performance data from a total of 104 subsurface flow systems and 70 free water surface flow systems are reviewed. The present state of knowledge is sufficient to apply constructed wetlands as a tool for improving water quality. The potential applications range from secondary treatment of municipal and various types of industrial wastewaters to polishing of tertiary treated waters and diffuse pollution. In many situations constructed wetlands is the only appropriate technology available. The treatment capacity of subsurface flow systems can be improved by selecting vertical flow systems with intermittent loading, by proper media selection, and by recycling of the wastewater. Further research is needed to help define and optimize engineering design criteria and the long-term performance capabilities and operational problems.

Design Criteria and Practice for Constructed Wetlands

1994 ◽  
Vol 29 (4) ◽  
pp. 1-6 ◽  
Author(s):  
Ronald W. Crites
Keyword(s):  
Wastewater Treatment ◽  
Constructed Wetlands ◽  
Water Surface ◽  
Municipal Wastewater ◽  
Wastewater Treatment Plants ◽  
Free Water ◽  
Surface Flow ◽  
Design Criteria ◽  
Municipal Wastewater Treatment ◽  
Municipal Wastewater Treatment Plants

Constructed wetlands are categorized into two types: free water surface flow or subsurface flow. Design criteria are set out for both types and operational details are given for both municipal wastewater treatment plants.

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