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Akter, A.; Tanim, A.H.; Islam, M.K. |
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Title |
Possibilities of urban flood reduction through distributed-scale rainwater harvesting |
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Journal Article |
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Year |
2020 |
Publication |
Water Science and Engineering |
Abbreviated Journal |
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13 |
Issue |
2 |
Pages |
95-105 |
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Keywords |
Low-impact development (LID), SWMM, HEC-RAS, Remote sensing, Urban flooding, Inundation depth |
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Abstract |
Urban flooding in Chittagong City usually occurs during the monsoon season and a rainwater harvesting (RWH) system can be used as a remedial measure. This study examines the feasibility of rain barrel RWH system at a distributed scale within an urbanized area located in the northwestern part of Chittagong City that experiences flash flooding on a regular basis. For flood modeling, the storm water management model (SWMM) was employed with rain barrel low-impact development (LID) as a flood reduction measure. The Hydrologic Engineering Center’s River Analysis System (HEC-RAS) inundation model was coupled with SWMM to observe the detailed and spatial extent of flood reduction. Compared to SWMM simulated floods, the simulated inundation depth using remote sensing data and the HEC-RAS showed a reasonable match, i.e., the correlation coefficients were found to be 0.70 and 0.98, respectively. Finally, using LID, i.e., RWH, a reduction of 28.66% could be achieved for reducing flood extent. Moreover, the study showed that 10%–60% imperviousness of the subcatchment area can yield a monthly RWH potential of 0.04–0.45 m3 from a square meter of rooftop area. The model can be used for necessary decision making for flood reduction and to establish a distributed RWH system in the study area. |
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1674-2370 |
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THL @ christoph.kuells @ Akter202095 |
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247 |
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Konapala, G.; Mishra, A.K.; Wada, Y.; Mann, M.E. |
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Title |
Climate change will affect global water availability through compounding changes in seasonal precipitation and evaporation |
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Journal Article |
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Year |
2020 |
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Nature Communications |
Abbreviated Journal |
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11 |
Issue |
1 |
Pages |
3044 |
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Both seasonal and annual mean precipitation and evaporation influence patterns of water availability impacting society and ecosystems. Existing global climate studies rarely consider such patterns from non-parametric statistical standpoint. Here, we employ a non-parametric analysis framework to analyze seasonal hydroclimatic regimes by classifying global land regions into nine regimes using late 20th century precipitation means and seasonality. These regimes are used to assess implications for water availability due to concomitant changes in mean and seasonal precipitation and evaporation changes using CMIP5 model future climate projections. Out of 9 regimes, 4 show increased precipitation variation, while 5 show decreased evaporation variation coupled with increasing mean precipitation and evaporation. Increases in projected seasonal precipitation variation in already highly variable precipitation regimes gives rise to a pattern of “seasonally variable regimes becoming more variable”. Regimes with low seasonality in precipitation, instead, experience increased wet season precipitation. |
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English |
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2041-1723 |
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THL @ christoph.kuells @ Konapala2020 |
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284 |
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Sahoo, S.K.; Jha, V.N.; Patra, A.C.; Jha, S.K.; Kulkarni, M.S. |
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Title |
Scientific background and methodology adopted on derivation of regulatory limit for uranium in drinking water – A global perspective |
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Journal Article |
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2020 |
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Environmental Advances |
Abbreviated Journal |
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2 |
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100020 |
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Keywords |
Drinking water, Global policy, Regulatory limits, Toxicity, Uranium |
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Guideline values are prescribed for drinking water to ensure long term protection of the public against anticipated potential adverse effects. There is a great public and regulatory agencies interest in the guideline values of uranium due to its complex behavior in natural aquatic system and divergent guideline values across the countries. Wide variability in guideline values of uranium in drinking water may be attributed to toxicity reference point, variation in threshold values, uncertainty within intraspecies and interspecies, resource availability, socio-economic condition, variation in ingestion rate, etc. Although guideline values vary to a great extent, reasonable scientific basis and technical judgments are essential before it could be implemented. Globally guideline values are derived considering its radiological or chemical toxicity. Minimal or no adverse effect criterions are normally chosen as the basis for deriving the guideline values of uranium. In India, the drinking water limit of 60 µg/L has been estimated on the premise of its radiological concern. A guideline concentration of 2 µg/L is recommended in Japan while 1700 µg/L in Russia. The relative merit of different experimental assumption, scientific approach and its methodology adopted for derivation of guideline value of uranium in drinking water in India and other countries is discussed in the paper. |
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2666-7657 |
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THL @ christoph.kuells @ sahoo_scientific_2020 |
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127 |
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Author |
Krüger, N.; Külls, C.; Bruggeman, A.; Eliades, M.; Christophi, C.; Rigas, M.; Eracleous, T. |
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Title |
Groundwater recharge estimates with soil isotope profiles-is there a bias on coarse-grained hillslopes? |
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Conference Article |
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Year |
2020 |
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EGU General Assembly Conference Abstracts |
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9840 |
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THL @ christoph.kuells @ Krueger2020groundwater |
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42 |
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Doulgeris, C.; Tziritis, E.; Pisinaras, V.; Panagopoulos, A.; Külls, C. |
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Title |
Prediction of seawater intrusion to coastal aquifers based on non-dimensional diagrams |
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Conference Article |
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Year |
2020 |
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EGU Geophysical Abstracts |
Abbreviated Journal |
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4073 |
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THL @ christoph.kuells @ Doulgeris2020prediction |
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41 |
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