摘要
为了解大沙河水库流域内营养盐输入对水库水质的影响,以2011年3月~2012年2月大沙河水库5条主要入库河流（大沙河、白沙河、双石河、富食河和沃江河）的水文水质监测数据为依据,分析了这些入库河流的流量和氮磷营养盐浓度,并估算了外源负荷总量,旨在为水库进行高效和合理的流域规划以及水质保护方案的制定提供科学依据。结果表明：位于西南方向的白沙河年平均流量最大（1.01 m3.s-1）,西北部富食河流量最小（0.23 m3.s-1）。各入库河流总氮平均浓度变化范围为1.62~4.37mg.L-1,总磷平均浓度范围为0.08~0.36 mg.L-1,其中富食河氮和磷营养盐的浓度最高,大沙河总氮浓度最低,白沙河总磷浓度最低,总体上西北部河流的氮磷浓度高于西南部河流。全年大沙河水库总氮输入量为176.7 t,总磷输入量为13.7 t。在所有入库河流中,位于水库北部的沃江河对水库营养盐输入量贡献最大,氮、磷负荷分别占总输入量的33%和32%,位于西部的双石河氮负荷最小（12%）,西南方向大沙河磷负荷最小（9%）。
Based on the investigation into hydrology and water quality at the five inflow rivers （Dasha River, Baisha River, Shuangshi River, Fushi River and Wojiang River） of Dashahe Reservoir from March 2011 to February 2012, we analyzed the inflow volume, nitrogen concentration and phosphorus concentration at these inflow rivers and calculated the total external loadings in order to reveal the catchment impacts on the reservoir water quality and provide substantial information for land use regulation and water quality protection. The results show that Baisha River is the biggest tributary with an average volume of 1.01 m3-s1, which is located at the southwest of Dashahe Reservoir. Fushi River is the smallest one with an average volume of 0.23 m3.s-1 at the northwest. The annual average concentration of total nitrogen （TN） ranged from 1.62 mg-L1 to 4.37 mg.L-1, and the annual average concentration of total phosphorus （TP） ranged from 0.08 mg.L1 to 0.36 mg.L1 at all the five tributaries. Fushi River had the highest annual concentrations of both TN and TP. Dasha River had the lowest annual TN concentration and Baisha River had the lowest annual TP concentration in terms of measurements. The annual loadings of TN and TP for Dashahe Reservoir were estimated to be 176.7 tons and 13.7 tons, separately. Among all the five inflow rivers, Wojiang River at the north of reservoir had the most significant contribution to nutrient inputs with 33% of TN loading and 32% of TP loading. Shuangshi River at the west had the smallest TN contribution with 12% of total loading and Dashehe River at the southwest had the smallest TP contribution with 9% of total loading.
出处
《生态科学》
CSCD
北大核心
2013年第2期158-164,共7页
Ecological Science
基金
中国科学院"百人计划择优支持项目"(YOBROB045)
"水体富营养化与赤潮防治广东普通高校重点实验室"(KLGHEI KLB07007)
国家自然科学基金项目(40871095)
暨南大学"引进优秀人才项目"(21030600)
