Authors:Chuan Li, Lingling Chen, Huan Li, Zimei Miao, Rui Yang, Lei Chu, Lingfeng Mao Pages: 113– - 113– Abstract: This research conducted a series of experiments, determined that 40% is the optimal sand-soil ratio, built three rain gardens, and planted Ilex chinensis Sims and Cynodon dactylon as a key element in the rain gardens. Among them, rain garden A was planted with only Cynodon dactylon for a one-year observation period. Rain gardens B and C, designed as three-year rain gardens, were planted with Ilex chinensis Sims or Cynodon dactylon, respectively. The method of simulating rainwater runoff was used to monitor the rain gardens continuously. The results showed that the total runoff reduction rates of rain gardens A, B, and C were 43%, 53%, and 55%, respectively. The average removal rates of pollutant suspended solids in rain gardens A, B, and C were 94%, 88%, and 87%, respectively, and the suspended solids pollution load reduction rate reached 96%, 94%, and 95%, respectively. This would be significant for future work and as a reference for the selection of plants for rain gardens in China. PubDate: 2023-05-10 DOI: 10.3846/jeelm.2023.19016 Issue No:Vol. 31, No. 2 (2023)
Authors:Balakrishnan Thanga Gurusamy, Avinash Durgadas Vasudeo Pages: 121– - 121– Abstract: Flood Risk Potential across South Asian Floodplains corresponding to 2010 economic exposures had been reported to be about 11 billion US2012$ and contributing more than 10% of Global values. Ecosystem approaches, based on Integrated Flood Management strategy of World Meteorological Organization, have been explored for balanced socio-economic and ecological adaptability enhancement, considering degradation of ecosystem services as fundamental issues and adaptation as optional solution. Adaptive Management methods have been explored for Flood Risk Minimization. General benefits of balanced socio-economic and ecological adaptation have been reviewed. Distributions of flood hazards, Gross Domestic Product, flood risk, Net Primary Productivity, carbon dioxide emissions and landscapes heterogeneity have been presented and analyzed for its influences over socio-economic and ecological adaptability. Distributions of Expected Annual Exposed socio-economic resources across 500 Years floodplains have been presented. Projected results corresponding to various two dimensional socio-environmental scenarios have been presented. Low Adaptable regions have been delineated. PubDate: 2023-05-18 DOI: 10.3846/jeelm.2023.19014 Issue No:Vol. 31, No. 2 (2023)
Authors:Gül Yücel, Kamil Erken Pages: 132– - 132– Abstract: This study aimed to investigate the ornamental utilization, two-year growth performance in natural habitat and cultural conditions, generative production methods, and morphologic and phenologic plant properties of Campanula grandis, which is an endemic species demonstrating ornamental plant potential and needs ex-situ conservation and cultivation. In addition, the germination and growth performance of seeds collected in the new season was compared with seeds that were kept for one year. Seeds stored dry for 3 months at 4 °C and then treated with 200 ppm GA3 exhibited the highest germination percentage (76%). Furthermore, GA3 treated seeds had best germination speed, shortening the germination time. This study also identified the ideal temperature for germination as 20 °C for the best germination rate. It was revealed that the number of flowers on the plant in natural habitat was 48 while in cultural conditions it was found as 165 flowers in biennial plants. The seedlings were planted in an ex-situ collection garden established for placing the Campanula grandis species under conservation. The Campanula grandis species has the potential for use as an ornamental plant for landscaping applications due to its lengthy flowering period, vigorous second-year stem growth, and numerous, enormous, flamboyant, blue-purple, and bell-shaped flowers. PubDate: 2023-05-22 DOI: 10.3846/jeelm.2023.19018 Issue No:Vol. 31, No. 2 (2023)
Authors:Joana Ūselytė, Arūnas Bukantis Pages: 142– - 142– Abstract: In this paper, climatic analysis of non-precipitation periods (NPP) in Lithuania was performed, assessing their recurrence and trends from 1991 to 2020 using two criteria – when precipitation was <0.1 mm per day all year round and when precipitation was <1 mm per day during the warm period – and analysing typical atmospheric circulation in the middle troposphere and sea level during the longest NPP (≥20 days). From 1990 to 2020, NPP were most frequent in the Middle Lithuania lowland (according to both criteria), in Southern and South-western Lithuania (daily precipitation <0.1 mm) and in part of Eastern Lithuania (daily precipitation <1 mm), and least frequent in part of the Samogitian highland and in part of the Baltic Highlands (according to both criteria). NPP recurred most often in the spring months, as this is associated with a higher number of days with anticyclonic circulation and powerful anticyclones recorded. Based on the growth trend of NPP of various durations in Lithuania from 1990 to 2020, in the last decade NPP have become more frequent, but only a few stations have shown reliable trends. Analysis of the atmospheric circulation during the longest NPP (≥20 days) showed that NPP were mostly determined by the Azores anticyclone ridge or anticyclone over Northern, Central or Eastern Europe regardless of the time of year. The atmospheric circulation conditions for the formation of long NPP varied more in the cold period than in the warm period, but NPP often lasted ≥20 days only at one or a few stations. PubDate: 2023-05-26 DOI: 10.3846/jeelm.2023.19017 Issue No:Vol. 31, No. 2 (2023)
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