NEWS ARTICLE
水务学术动态：Hydrological and Water Quality Implications of Water Hyacinth: A Case Study of Lake Tana, Ethiopian Highlands
论文标题：Hydrological and Water Quality Implications of Water Hyacinth: A Case Study of Lake Tana, Ethiopian Highlands
发布日期：2026-05-21
作者：Alemu B. Mengesha, Temesgen Enku, Assefa M. Melesse, Minychl G. Dersseh
DOI：10.3390/w18101247
论文摘要：Water hyacinth (Eichhornia crassipes) is a widespread invasive plant in tropical and subtropical regions, creating serious ecological and hydrological problems. Beyond disrupting aquatic ecosystems, it increases unaccounted water loss and alters key physicochemical properties. This study evaluated the evapotranspiration of water hyacinth and its influence on water quality in Lake Tana, Ethiopia’s largest freshwater lake. Two artificial ponds (one control and one covered with water hyacinth), each measuring 1 m × 1 m × 0.94 m, were monitored over three months to quantify water loss. In parallel, water samples were collected from the lake at 0.5 m depth along 2 km intervals, comparing hyacinth infested and open-water sites. The results showed clear differences between conditions. Dissolved oxygen was significantly lower in hyacinth-covered areas (6.65 ± 0.44 mg/L) than in open water (7.93 ± 0.42 mg/L). Similarly, pH decreased under hyacinth cover (5.53 ± 0.53) compared to non-infested sites (6.53 ± 0.40). In contrast, water temperature increased in infested areas (23.70 ± 0.42 °C) relative to open water (22.08 ± 0.33 °C). Total dissolved solids were slightly but significantly lower in hyacinth-covered water. Evapotranspiration from water hyacinth was about 1.6 times higher than evaporation from open water, with an estimated monthly loss of 0.28 m3 per square meter. When scaled to lake conditions, this corresponds to approximately 0.78 to 7.01 million m3 of water loss per month, though actual values may vary due to environmental factors. Overall, water hyacinth substantially affects both water quantity and quality, highlighting its importance for lake management and sustainable water use.
元数据：Crossref 收录的 MDPI Water 论文。 DOI: 10.3390/w18101247. Vol. 18, Issue 10. Authors: Alemu B. Mengesha, Temesgen Enku, Assefa M. Melesse, Minychl G. Dersseh.
开放许可：https://creativecommons.org/licenses/by/4.0/
原文链接：https://doi.org/10.3390/w18101247
PDF 链接：https://www.mdpi.com/2073-4441/18/10/1247/pdf