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פותח על ידי קלירמאש פתרונות בע"מ -
Relationships between clogging in irrigation systems and plankton community structure and distribution in wastewater reservoirs
Year:
2014
Source of publication :
Agricultural Water Management
Authors :
מילשטיין, אנה
;
.
Volume :
140
Co-Authors:
Milstein, A., Agricultural Research Organization (ARO), Fish and Aquaculture Research Station Dor, M.P. Hof HaCarmel 30820, Israel
Feldlite, M., Israel Water Workers Association, Eyal, mid-Sharon 45480, Israel
Facilitators :
From page:
79
To page:
86
(
Total pages:
8
)
Abstract:
The development of large populations of cladocerans and copepods in reservoirs that store wastewater for crop irrigation causes severe clogging in irrigation systems. In most reservoirs in Israel water is filtered at the banks of the reservoirs before being sent to irrigation. This avoids/reduces clogging in the irrigation systems transferring the problem to the storage reservoirs. To cope with this problem we studied relationships between clogging and particle size distribution in a range of secondarily treated wastewater reservoirs with different characteristics and water management. Since the reservoirs are deep and thermal stratification develops, measurements of the time required to clog 100. μm pore net filters and samples for physico-chemical and microscopic analyses were collected in the surface, deep epilimnion and hypolimnion. Factor analysis allowed identifying two independent sets of environmental conditions and planktonic species that lead to clogging of irrigation filters. The first set is related to thermal stratification and the development of a planktonic community with a complex web of feeding interactions in which the organisms capable of clogging filters are mainly copepods. The second set occurs in spring and fall, and includes planktonic organisms forming a short food chain in which the organisms capable of clogging filters are mainly cladocerans. A third factor was organic loading, mostly related to the entrance of fresh wastewater into the reservoirs during the irrigation season, which had a negative effect on nitrification and promoted blue green algae development and copepod reproduction. The analysis of potential management procedures to avoid filter clogging indicates that in these reservoirs manipulations of food web interactions in the planktonic community structure towards smaller organisms that do not clog filters would not be effective against copepods. A better option to decrease clogging events is to avoid pumping water out from the deep epilimnion, preferably pumping from the hypolimnion. © 2014 Elsevier B.V.
Note:
Related Files :
algae
epilimnion
irrigation
physicochemical property
plankton
Reproduction
thermal stratification
wastewater treatment
עוד תגיות
תוכן קשור
More details
DOI :
10.1016/j.agwat.2014.03.020
Article number:
Affiliations:
Database:
סקופוס
Publication Type:
מאמר
;
.
Language:
אנגלית
Editors' remarks:
ID:
26703
Last updated date:
02/03/2022 17:27
Creation date:
17/04/2018 00:24
You may also be interested in
Scientific Publication
Relationships between clogging in irrigation systems and plankton community structure and distribution in wastewater reservoirs
140
Milstein, A., Agricultural Research Organization (ARO), Fish and Aquaculture Research Station Dor, M.P. Hof HaCarmel 30820, Israel
Feldlite, M., Israel Water Workers Association, Eyal, mid-Sharon 45480, Israel
Relationships between clogging in irrigation systems and plankton community structure and distribution in wastewater reservoirs
The development of large populations of cladocerans and copepods in reservoirs that store wastewater for crop irrigation causes severe clogging in irrigation systems. In most reservoirs in Israel water is filtered at the banks of the reservoirs before being sent to irrigation. This avoids/reduces clogging in the irrigation systems transferring the problem to the storage reservoirs. To cope with this problem we studied relationships between clogging and particle size distribution in a range of secondarily treated wastewater reservoirs with different characteristics and water management. Since the reservoirs are deep and thermal stratification develops, measurements of the time required to clog 100. μm pore net filters and samples for physico-chemical and microscopic analyses were collected in the surface, deep epilimnion and hypolimnion. Factor analysis allowed identifying two independent sets of environmental conditions and planktonic species that lead to clogging of irrigation filters. The first set is related to thermal stratification and the development of a planktonic community with a complex web of feeding interactions in which the organisms capable of clogging filters are mainly copepods. The second set occurs in spring and fall, and includes planktonic organisms forming a short food chain in which the organisms capable of clogging filters are mainly cladocerans. A third factor was organic loading, mostly related to the entrance of fresh wastewater into the reservoirs during the irrigation season, which had a negative effect on nitrification and promoted blue green algae development and copepod reproduction. The analysis of potential management procedures to avoid filter clogging indicates that in these reservoirs manipulations of food web interactions in the planktonic community structure towards smaller organisms that do not clog filters would not be effective against copepods. A better option to decrease clogging events is to avoid pumping water out from the deep epilimnion, preferably pumping from the hypolimnion. © 2014 Elsevier B.V.
Scientific Publication
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