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A platform for research: civil engineering, architecture and urbanism
Performance of various halophytes for concentrate volume reduction
The City of San Diego has undertaken efforts to increase local sources of water supply. The SPBGMP (San Pasqual Basin Groundwater Managament Plan) identifies several opportunities for improving the basin's groundwater quality. Water quality within the San Pasqual Basin has varied, but generally high levels of nitrates and TDS (total dissolved solids) are found in the western part. A 150 gpm (gallon per minute) brackish groundwater TDDF (temporary desalination demonstration facility) was installed and operated. Based on the result obtained during the limited evaluation period, the following preliminary recommendations are provided: (1) During the short period of evaluation, Scirpus americanus and Typha angustifolia showed the greatest promise for brine minimisation capability during the warm summer months. Scirpus americanus specie did not appear to be negatively impacted by the salinity of the concentrate. However, a noticeable decrease in evapotranspiration rate was observed for the Typha specie following the switch from groundwater to concentrate. Additional testing should be performed to gauge the ability of both species to evapotranspirate water from the concentrate during the cooler winter weather and shorter daylight hours. (2) Although Salicornia virginica is capable of salinity tolerance approaching 35,000 mg/l, the study was unable to effectively gauge performance due to lack of growth following dormancy and also due to interference by an unknown species which tended to overrun the Salicornia virginica in the areas where it was found in the wetland demonstration. Further studies should eliminate Salicornia virginica from further consideration at the San Pasqual site. (3) Attempts to grow the Rhizaphora mangle were thwarted by the young age of the specie furnished for the demonstration and by the temperature extremes that are prevalent in the San Pasqual valley. The temperature extremes proved too difficult to encourage growth in this climate zone. Additional study should be considered at the academic level to determine whether larger established Rhizaphora mangle can survive in this climate. The conditions that may encourage increased concentrate uptake and evapotranspiration, as observed in limited published studies and separate ongoing university research, could not be duplicated in the San Pasqual valley. Further study of this specie for concentrate minimisation in the San Pasqual valley is not recommended at this time.
Performance of various halophytes for concentrate volume reduction
The City of San Diego has undertaken efforts to increase local sources of water supply. The SPBGMP (San Pasqual Basin Groundwater Managament Plan) identifies several opportunities for improving the basin's groundwater quality. Water quality within the San Pasqual Basin has varied, but generally high levels of nitrates and TDS (total dissolved solids) are found in the western part. A 150 gpm (gallon per minute) brackish groundwater TDDF (temporary desalination demonstration facility) was installed and operated. Based on the result obtained during the limited evaluation period, the following preliminary recommendations are provided: (1) During the short period of evaluation, Scirpus americanus and Typha angustifolia showed the greatest promise for brine minimisation capability during the warm summer months. Scirpus americanus specie did not appear to be negatively impacted by the salinity of the concentrate. However, a noticeable decrease in evapotranspiration rate was observed for the Typha specie following the switch from groundwater to concentrate. Additional testing should be performed to gauge the ability of both species to evapotranspirate water from the concentrate during the cooler winter weather and shorter daylight hours. (2) Although Salicornia virginica is capable of salinity tolerance approaching 35,000 mg/l, the study was unable to effectively gauge performance due to lack of growth following dormancy and also due to interference by an unknown species which tended to overrun the Salicornia virginica in the areas where it was found in the wetland demonstration. Further studies should eliminate Salicornia virginica from further consideration at the San Pasqual site. (3) Attempts to grow the Rhizaphora mangle were thwarted by the young age of the specie furnished for the demonstration and by the temperature extremes that are prevalent in the San Pasqual valley. The temperature extremes proved too difficult to encourage growth in this climate zone. Additional study should be considered at the academic level to determine whether larger established Rhizaphora mangle can survive in this climate. The conditions that may encourage increased concentrate uptake and evapotranspiration, as observed in limited published studies and separate ongoing university research, could not be duplicated in the San Pasqual valley. Further study of this specie for concentrate minimisation in the San Pasqual valley is not recommended at this time.
Performance of various halophytes for concentrate volume reduction
Bowdan, Joel E. (author) / Sekeroglu, Sarp (author) / Yarkin, Mustafa (author) / Rahimian-Pour, Alex (author)
2010
8 Seiten, 3 Bilder, 3 Tabellen, 2 Quellen
Conference paper
Storage medium
English
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