Relationship between the Water Body Chlorophyll-a and Water Quality Factors of Wetlands Baiguishan R

Agricutural Science & Technology, 2011, 12(4): 581 -583.591Copyright 02011, Information Institute of HAAS. Al rights reseved.Resources and EnvironmentRelationship between the Water Body Chlorophyll-aand Water Quality Factors of Wetlands BaiguishanReservoirSHE Qiu-sheng, TIAN Xun, WANG Guo-zhen, JI Xlao-cun, L Jlu-xuan, ZHAO Zhen "Department of Biological Engineering, Henan University of Uban Construction, Pingdingshan 467036Abstract [Objective] The aim was to explore the relationship between water body Chloroplhl-a and water quality factors of wetiands Baiguis-han reservoir. [Method ] Chlorophyl-a and water quality factors of water quality of Wellands BaiGuishan Reservoir was studied, the analysis ofthe relationship on water quality of Wetlands Baiguishan Reservoir was made by use of trophic status indices and SPSS17.0 statistical analysis.[ Result] Total phosphorus was an important factor of influence Chloropyl-a in reservoir, water body had slight eutrophication phenomenon inreservoir of July to October in 2010. [ Conchusioo ] Comprehensive management should be strengthened so as to improve the water quality ofshan WetlandBaiguishan VKey words Wetlands Baiguishan Resrvir;hoplyl-a; Water quality factors; RelationshipThe wetlands Baiguishan ( the Reservoir which was buit selected for fve sampling points: east, wsst, north andatifcially in 1965) is located in the mainstream of Huaihe Riv-south, and middle from Baiuishan wetland area (Fig. 1).er, the southwest area of Pingdingshan City, which is a floodThe sampling time and frequency: May 2010 to Octobercontrol, giving agricultural irigation, industrial and urban wa-2010, once a month.ter supply reservoir. Baiguishan wetland reservoir is an impor-tant part of the wetland resources in Henan Province. It pro-vides the drinking water to the local people, and plays an im-” Northportant role in maintaining ecological balance system and theSouthCenterprotection of biological diversity. In adition, it is the regulatorBaiguishan Reservoirof south-to-north water diversion project. Therefore, the stud-Westasties on dynamic monitoring of Baiuishan wetland reservoir cannot only provide the scientific basis for water qualiy protectionand ecological environment protection policies, but also enrichFlg.1 Sampling distribution of Baiguishan wetiand areathe ecological research database of midline of the south-to-Selection of monitorng projectnorth water diversion project.According to the national lake eutrophication surveyPhytoplankton plays an important role in the process ofstandard', and with reference to the surface water environ-material circulation, energy conversion in lake ecosystems,ment quality standards ( GB3838-2002) and other standard,and the Chloropyll-a (Chla) content in water is an evaluationaccording to the specific circumstances of Baiguishan wetlandof phytoplankton biomass, which is also the important index of area, the ammonia nitrogen (NHy-_N) . total phosphorus (TP)productivity and the number of algae, an important parameterand dissolved oxygen (OD), potassium permanganate indexof eutrophication. Therefore, we monitor the environmental(CODm) and chlorophyl a were detected and analyzed.factors index of wettand resevoir, survey the eutrophicationNutrition evaluationssituation and using mutiple stepwise regression analysis, findBased on the content of Chiorophyl-a, potassium pemanout the environmental factors which is significant correlationganate index, phosphorus index, according to the nutrition indexwith Chlorophyll-a and establish forecasting model to providecalculation formula to calculate TU (Chla), TU(COD) andthe scientific basis for the corresponding countermeasures to TU( TP), refer to the relative weight clculation fommula andprevent and control it.comprehensive nutritin exponential formulae, calculate compre-hensive nutritin index fomula; TU (Z) =TU (E) =Z W, xMaterials and MethodsTU(), the nutrtive ratio type of reservoir Baiguishan wet-Sampling place and sampling timeland was evaluated2lOn the basis of Water quality-guidance on sampling tech-Statistical analysesniques( GB1299891), according to the geographical charac-May to October,teristics and combined with the reservoir situation, surround-2010，中国煤化工n satistics method,ing humanity of Baiguishan wetland area, five directions werefour enTIYH.CNMHGhe ammonia nitrogenand phlate index and dis-Received: March 12, 2011Accepted: Apil5, 2011solved oxygen and algae Chlorophl-a) for stepwise regres-Supported by Natural Science Study Fund from the Department ofsion analysis, and the stepwise regression equation was e昭Education of Henan ( 2010B610002).tablished, and it was found that the significant environmental# Corresponding author. E-mail; zhaozhen@hnqj. edu. cnfactor that infuenced algae Chorplyl-a. Four environment582Agricultural Science & Technology Vol. 12, No.4, 2011factors were used as independent variables and algae Chloro-phyl-a was used as dependent variable to cary out statisticalLanalysis with SPSS 17. 0 and conclude the multiple stepwiseregression equation and complex correlation coefficient.. 。CanterResults and AnalysisTime-space distribution of physical and chemical indexesAccording to Surface Water Environment Quality Stand-aards( GB383888-2002 ) in China 91 , the test reults of monito-ring ammonia nitrogen, total phosphorus, potassium perman-MalyJuneJuly Agst Septa ber Octoberganate index and dissolved oxygen were shown in Fig.2 -5.Fig.4 Time-space distribution of Total PThe results showed that:①in monitored time, the ammonianitrogen and potassium permanganate indexes were growingup gradually, reaching the highest in August and declining af-ter;②in May to October of 2010, total phosphorus contentwas increasing, and reaching to its top in July;③the content- Canterof dissolved oxygen were declining, lowest in August and ris-ing after;④the dissolved oxygen saturation locus might occurdue to lower water temperature, less oxygen consumed bymicroorganisms in water and oxygen in water produced byphotosynthetic bacteria; ⑤from regional perspective, the mo~nitoring indicators in the west and south of the BaiguishanJueJuly lgst Septa her lctoberWetlands were higher.Fig.5 Time-space ditribution of dissolved oxygenTime-space distribution of Chlorophyl-a contentThe content of chloroplylla was detected, and the testresults in Fig. 6 showed that: ①with the temperature grow-+ Southing, Chioropl-a content overall showed a rising trend, andreaching to its top in August;②it declines greatly in Septem-- xCanterber, which might be due to the rainfall and upstream food dis-charge;③the average content of Chlorophyl-a in the sixmonths showed the trend of south reservoir >midle reservoir >west reservoir > north reservoir > east reservoir, Chlorophyll-acontent was higher in southwest than which in northeast ofBaiguishan wetland reservoir.July Lgst Sepcamber QctoberFig.6 Time-space distribution of Chlorophyl-a8number of alga is. In practical work, it's always regarded asthe main factor of water eutrophication. However, due to the6一Catercomplexity of the water ecological system and the eutrophica-tion process, multiple factor evaluation methods are adoptedto evaluate the water eutrophication. Integrated nutrition stateindex is based on mtti-factor evaluation index of Chorpyl-a.An average TLI value of the Baiguishan Wetlands in May -Jurehuly lgst Soptaber QctoberOctober of 2010 was shown in Fig. 7. Besides, Table 1showed the grading standards of lake nutrition state. It couldFig.2 Time-space distribution of permanganate indexbe concluded from Fig.7 that:①the TLIvalue of the Baiguis-han Wetlands in comprehensive nutritin state in May to June7[and in Moderate nutrition state, July to October in slight eu-trophication status; 2 in monitoring time, integrated TLI valuewas increased gradully, which was the highest in August and. -Oater圭declining after;③from its influencing situation, total phos-phorus content was the major factor of integrated nutrtionstate index of water.Table 1 Grading of Lakes nutrition stateTUva中国煤化工ilybgst Spcaiber CcokcTU<3fYHCNMHGFig.3 Time-space distribution of Ammonia nitrogen content30≤7Evaluation of comprehensive nutrition state of Baiguis-50< TU≤60Mild europhication60< TU≤70Medium eutrophicationhan wetland areaChlorophyl-a is overall target rflecting how much theTU>70Severe eutrophicationSHE Qiu-sheng et al. Relationship between the Water Body Chloroplyl-a and Water Qulity Factors of Wetands Baiguishan Reservoir583Linear correlation matrix between Chorophyll-a and20 [Physical-chemical factors of Baiguishan wetland area00工L (CTD)The linear relationship analysis of five parameters: Chlo.LIOrophylIl-a, ammonia nitrogen and phosphorus, potassium per-30manganate index and dissolved oxygen was carried out, and50the result was shown in Table 2. It was found that Chloroplyll-a2and ammonia nitrogen, phosphorus and potassium permanga-nate index showed positive correlation, and the correlation be-20tween total P and Chloropll-a was significant, so the totalphosphorus was more likely the restrictive factor to algalJuneJulylupust Septatber Octobergrowth of Baiguishan wetland area.Fig.7 Comprehensive nutition state index of Baiguishan wet-land areaTable2 Linear crrelation cofficient A of physical and chemical factors and chlorophy a of BaiguishanIndexChlorophy/l-aAmmonia nitrogenTotal PPemanganate indexDissolved oxygenChlorophyll A0.453*10.545"0.291Permanganate index0.377*0.848**0.3590.444"-0.493*。means signiticanty related (P<0.05)， * * means extremely signiticant correlation(P<0.01).Stepwise regression analysis of physical-chemical factorsphosphorus and potassium permanganate index were shownand algae Chlorophyll-a of Baiguishan wetland areain Fig. 9: Choroplyl-a had a significant difterence betweenFour factors of five sampling places were used to carryammonia nitrogen, phosphorus and potassium permanga-out stepwise regression analysis of physical-chemical factorsnate index, and chlorophyll an increased significantly whenand algae Chlorophyll-a of Baiguishan wetland area, and thetotal phosphorus concentration increased.screening independent variable was selected at the significant+ Relativity of Mmonislevel critical value 95% and establish comprehensive regres-. nitroeg ind chorpyllsion equation:gesphonus andehoroblChla =0.72 x(NH-N) +3.34 *(TP) -0.35*(CODm) +10index and chlorophyil-a1.348y-0235 2x+ 14220The regression equation of the three variable factors was, R-0.1417y-0313 Tx+L 0101analyzed successively: water quality factor, establish ammo-nia nitrogen, phosphorus and potassum permanganate index. B-t2045●of Baiguishan wetland reservoir. It was found that the mutiplecorrelation coeffcient was 0. 636, comprehensive F value wasy-0078 lbx+0.396 s5. 888, while P value was 0.003.“”-0.2972。It could be concluded from Fig.8 that the average Chloro-phll-a concentration of return simulaton value curves was rel10立14ative coincident with the measured in monitoring time, theUhit i/Ltemperature was high in August and October, and there was aFlg. 9 Water Chorophll-a content and ammonia nitrogen,low ebb in September, which mainly related to flooo dischargephosphorus and potassium pemanganate indexof ZhaoPingTai reservoir and too much rantall+ Masured ValueConclusion+ Predictive ValueThe analysis of the chlorophyll a and water quality fac-tors of Baiguishan wetland area from May to October of 2010showed that:①the south side had a higher Chorophyll-alevel than other areas, the results were geared to the high目3content element such as the nitrogen and phosphorus con-sistent and in south side;②Chloropyl-a and ammonia ni-trogen, phosphorus and potassium permanganate index hadpositive correlation, and the total phosphorus was signifi-August Septanber Octobercant;③Based on the content of Chlorophl-a, potassiumFig.8 Compare the average Chloropll-a concentration ofpermar中国煤化工，according to theretum simulation value curves relative with the meas-nutritio_Iculate TU, the TLured in monitoring timevalue CYC N M H G mild eutrophicationRelations between water chlorophyll a and water qualitystatus.factor of Baiguishan wetland reservoirTo improve the water quality of Baiguishan wetland, weWater Choroplyll-a content and ammonia nitrogen,(下转第591页)ZHENG Kai et al. 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