scholarly journals Sources Affecting PM<sub>2.5</sub> Concentrations at a Rural Semi-Arid Coastal Site in South Texas

2013 ◽  
Vol 04 (01) ◽  
pp. 152-162 ◽  
Author(s):  
Saritha Karnae ◽  
Kuruvilla John
Keyword(s):  
South Texas ◽  
Coastal Site ◽  
Semi Arid

YIELD AND QUALITY OF RED STIGMAS FROM DIFFERENT SAFFRON STRAINS AT CONTRASTING MEDITERRANEAN SITES

2006 ◽  
Vol 42 (4) ◽  
pp. 399-409 ◽  
Author(s):  
S. K. YAU ◽  
M. NIMAH ◽  
I. TOUFEILI
Keyword(s):  
Field Experiments ◽  
High Elevation ◽  
Crocus Sativus ◽  
Coastal Site ◽  
Yield And Quality ◽  
High Elevation Site ◽  
Colour Strength ◽  
Semi Arid

Three different saffron strains (Crocus sativus, C. sativus var. ‘cashmerianus’ and C. cartwrightianus) were tested for two years in field experiments to study their red stigma yield and quality. The experiments were performed at a high-elevation (rainfed or irrigated) site and a coastal site in Lebanon. On average, the two C. sativus strains gave more flowers and stigma yield than C. cartwrightianus. The former was more productive in the more favourable environments, especially at the warmer coastal site, than the latter. C. sativus ‘cashmerianus’, which yielded better at the coastal site in 2004 and gave a stronger colour strength and aroma, appeared to be the better choice for the area. Mean yield at the coastal site was twice that at the non-irrigated high-elevation site. On average, saffron produced at the coastal site had more colouring strength and bitterness than that produced at the high-elevation site. Nevertheless, viable commercial saffron production may still be possible in the semi-arid, high-elevation Bekaa Valley if irrigation can be provided.

scholarly journals WinSLAMM Simulation of Hydrologic Performance of Permeable Pavements—A Case Study in the Semi-Arid Lower Rio Grande Valley of South Texas, United States

Water ◽  
2019 ◽  
Vol 11 (9) ◽  
pp. 1865 ◽  
Author(s):  
Taufiqul Alam ◽  
Ahmed Mahmoud ◽  
Kim D. Jones ◽  
Juan César Bezares-Cruz ◽  
Javier Guerrero
Keyword(s):  
Rio Grande Valley ◽  
Rio Grande ◽  
Concrete Pavement ◽  
South Texas ◽  
Lower Rio Grande Valley ◽  
Permeable Pavements ◽  
Runoff Reduction ◽  
Semi Arid ◽  
Lower Rio Grande ◽  
Hydrologic Performance

This study used the Source Loading and Management Model for Windows (WinSLAMM) to develop a set of calibrated hydrologic models for three types of regional permeable pavements—porous concrete pavement (PCP), permeable interlocking concrete pavement (PICP), and interlocking block pavement with gravel (IBPG). The objective was to assess the hydrologic performance of permeable pavements, including the runoff depth, peak discharge, percentage increment in runoff reduction of pavements as a function of rainfall depth, development area, and base aggregate porosity, respectively. The permeable pavements were monitored over a wide range of rainfall events in the semi-arid Lower Rio Grande Valley of South Texas. Data regarding rainfall intensities, source characterizations, runoff coefficients, and pavement design were initialized as WinSLAMM input. Validation results showed that the calibrated models could over or under-predict runoff reduction within a 30% error range. PCP and IBPG were very effective and could be capable of handling storms as large as 50-year frequency over a 24-h time period. The modeling results showed that PCP might require a 50–60% lesser footprint area as compared to PICP and IBPG, respectively. Additionally, PCP might be able to store 30% additional runoff if the porosity of base aggregates was increased by 40%.

Seasonal dynamics of dissolved Ra isotopes in the semi-arid bays of south Texas

2010 ◽  
Vol 122 (1-4) ◽  
pp. 39-50 ◽  
Author(s):  
J.A. Breier ◽  
C.F. Breier ◽  
H.N. Edmonds
Keyword(s):  
Seasonal Dynamics ◽  
South Texas ◽  
Semi Arid

scholarly journals A Comparison of Three Types of Permeable Pavements for Urban Runoff Mitigation in the Semi-Arid South Texas, U.S.A

Water ◽  
2019 ◽  
Vol 11 (10) ◽  
pp. 1992 ◽  
Author(s):  
Taufiqul Alam ◽  
Ahmed Mahmoud ◽  
Kim D. Jones ◽  
Juan César Bezares-Cruz ◽  
Javier Guerrero
Keyword(s):  
Environmental Performance ◽  
Oxygen Demand ◽  
South Texas ◽  
Permeable Pavement ◽  
Porous Concrete ◽  
Permeable Pavements ◽  
Runoff Reduction ◽  
Outflow Rate ◽  
Flow Attenuation ◽  
Semi Arid

This study examines the hydrologic and environmental performance of three types of permeable pavement designs: Porous Concrete Pavement (PCP), Permeable Interlocking Concrete (PICP), and Interlocking Block Pavement with Gravel (IBPG) in the semi-arid South Texas. Outflow rate, storage, Normalized Volume Reduction (NVR), Normalized Load Reductions (NLR) of Total Suspended Solids (TSS), and Biochemical Oxygen Demand (BOD5) were compared to results obtained from adjacent traditional pavements at different regional parking lots. A notable percentage of peak flow attenuation of approximately 31–100% was observed when permeable pavements were constructed and implemented. IBPG was capable to hold runoff from rainfall depths up to 136 mm prior to flooding. PCP was the most satisfactory in reducing surface runoff (NVR: 2.81 × 10−3 ± 0.67 × 10−3 m3/m2/mm), which was significantly (p < 0.05) higher (98%) than the traditional pavement. PCP was also very effective in TSS removal (NLR: 244 × 10−5 ± 143 × 10−5 kg/m2/mm), which was an increase of over 80% removal than traditional pavement. IBPG (NLR: 7.14 × 10−5 ± 7.19 × 10−5 kg/m2/mm) showed a significantly (p < 0.05) higher (46%) BOD5 removal over traditional pavement. These results demonstrate that the type of permeable pavement and the underlying media can significantly influence the runoff reduction and infiltration in this climatic region.

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