Title: Quality Assessment of the Supplementary Water for Honghe National Nature Reserve
Abstract: The process of water resources restoration scheme for Honghe National Nature Reserve(HNNR) was briefly presented,and the farmland surface runoff is the source of supplementary water.Respectively on 7 July and 18 September of 2002,and 10 September of 2007,water samples were taken at the same sites in the core zone of HNNR and the Main Canal of Nongya Flood Control(NFCMC)(site for supplementary water).The analysis of water quality showed that:(1) No pollutants from industrial wastes were detected in the core zone of HNNR;(2) Water quality was closely related to water level or water flow;(3) Water quality was also related to the growing seasons of wetland vegetation;(4) COD and BOD5 were 37.73-63.08mg/L and 15.2-28.70mg/L,respectively,not caused by external pollution sources;(5) Concentrations of TN and TP are relatively higher,probably related to the cycling of biogeochemical elements in the wetland,not caused by surface runoff from farmlands.The water quality analysis of NFCMC showed that:(1) Water quality reflected evident farmland surface runoff;(2) Water quality may be related to NFCMC's function of purification of the farmland surface runoff water.Water quality of the supplementary water was better than that of the core zone of HNNR.Depending on the existing monitoring data,the water quality from NFCMC can meet the water quality requirements by HNNR.Further studies on dynamics of pesticide residuals in both HNNR and NFCMC were proposed,in combination with aquatic biodiversity survey,so as to provide policy proposals.The farmland surface runoff water in Sanjiang Plain can be collected through water resources conservation measures and purified by wetland oxidation process,and used as the source of supplementary water for degraded wetland.
Publication Year: 2009
Publication Date: 2009-01-01
Language: en
Type: article
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