Long-term interaction between land use patterns and water quality in tropical reservoirs
Long-term interaction between land use patterns and water quality in tropical reservoirs
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热带水库土地利用模式与水质之间的长期相互作用
DOI：
10.1127/fal/2022/1410
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发表时间：
2023
影响因子：
1
通讯作者：
Nguyen Lam Ngoc
中科院分区：
文献类型：
--
作者：
Pham Luu Thanh;Nguyen Quang Hao;Truong Cung Que Nguyen;Tran Hoang Yen Thi;Tran Thai Thanh;Ha Thang Nam;Le Thap Van;Nguyen Lam Ngoc
土地利用和土地覆盖变化（LULC）影响了全球水资源的完整性和质量，特别是在越南，经济高度依赖农业用地。LULC已经使该地区的许多水体退化，例如越南南部最大的淡水水体之一Tri An水库（TAR）。本研究调查了土地利用模式和水质在TAR盆地（TARB）的长期相互作用。土地利用类型和景观指标被用来调查在流域尺度上与水的理化变量的相关性。结果表明，郁闭度是影响水体浊度、溶解性无机氮（DIN）和总磷（TP）的最主要因素，而多年生植物/果园比例是影响水体总悬浮物（TSS）的最主要因素。建成区/居民区显着影响浊度，TSS和总溶解固体（TDS）。几个景观指标与浊度相关，表明土地利用类型和景观指标在TARB显着影响TAR的水质。在过去的二十年里，TAR经历了水质退化，主要是由于富营养化，氮和磷的增加趋势。为改善水质和控制水体富营养化，未来的研究应考虑减少氮和磷的输入。
Land use and land cover changes (LULCs) have affected the integrity and quality of water resources globally, especially in Vietnam, where the economy highly depends on agricultural land. LULC has degraded many waterbodies in the region, such as Tri An Reservoir (TAR), one of the largest freshwater bodies in Southern Vietnam. This study investigated the long-term interaction between land use patterns and water quality in the TAR Basin (TARB). Land-use types and landscape metrics were used to investigate the correlation with water physicochemical variables at watershed scale. The results indicated that dense forest area was the most important factor influencing turbidity, dissolved inorganic nitrogen (DIN), and total phosphorous (TP), while the proportion of perennial/orchard mostly influenced total suspended solids (TSS). The built-up/residential area significantly influenced turbidity, TSS, and total dissolved solids (TDS). Several landscape metrics correlated properly with turbidity, indicating that land-use types and landscape metrics in TARB significantly influenced water quality in TAR. Over the past two decades, TAR has experienced degradation in water quality mainly due to eutrophication with increasing trends of nitrogen and phosphorus. To improve water quality and control water eutrophication, future research should consider reducing nitrogen and phosphorus inputs.