阜新皮革产业开发区第一污水处理厂提标改造项目-地表水环境影响专题评价

模型率定及验证细河，属大凌河水系呈北东～南西向通过。属常年性河流。细河发源于阜蒙县境内的骆驼山西坡，由东北向西南流经阜新市和东梁地区，进入义县复兴堡流入大凌河，全长113km，汇水面积约2932km2，坡降为0.03～0.19‰，该河床宽120.0～200.0m，河道河宽15~50m，水深2~3.5m，河床坡降0.03~0.19%，径流深度850mm，年径流量为0.26亿m3/a。径流模数为27.3cm3/s.km，侵蚀模数为169.3m3/km3，年平均输沙率为18.8kg/s。模型率定选取曼宁系数32、涡粘系数0.28。项目排污口下游1000mD4断面2019年的监测数据中COD浓度为24.5mg/L，NH3-N浓度为0.134mg/L，采用此断面污染物浓度监测值验证模型，预测计算值见图6和图7，预测计算值与实测值对比情况见表6。由表6可知，各指标浓度计算值与实测值吻合较好，说明地形及参数选取合适、可靠。图6模型率定及验证—COD浓度预测计算值图7模型率定及验证—NH3-N浓度预测计算值表6湿地排水口下游污染物浓度计算值与实测值对比断面编号排污口下游/mCODNH3-N实测值mg/L计算值mg/L误差%实测值mg/L计算值mg/L误差%D4104024.522.58.20.1340.1393.6由表可知，COD预测计算值与实际监测值误差为8.2%，NH3-N预测计算值与实际监测值误差为3.6%，可认为模型计算地形图及相关参数选取合适。3.6预测结果及分析采用MIKE21Ecolab模块对正常工况下的COD和NH3-N浓度进行模拟计算，分析本项目排放口污染物对水质的影响范围和程度，获得正常工况下枯水期、平水期和丰水期COD和NH3-N的浓度场见图8~图19，排污口下游污染物COD和NH3-N浓度预测值见表7~表12。枯水期水质预测结果及分析枯水期，本项目正常排水排污口下游至D5断面COD预测浓度值范围为20.3659~32.5883mg/L，NH3-N预测浓度值范围为0.2948~2.3602mg/L。细河所在水功能区水质管理目标为Ⅴ类水质标准，本项目建成后，在正常工况下，枯水期时，本项目排污口排入细河的COD、NH3-N影响现状水质的范围较小，并迅速扩散，可达到《地表水环境质量标准》（GB3838-2002）Ⅴ类标准。D4监测断面水质预测浓度为COD：24.5363mg/L、NH3-N：0.3716mg/L；D5控制断面（排污口下游9980m）水质预测浓度为COD：20.3659mg/L、NH3-N：0.2948mg/L，均可达到《地表水环境质量标准》（GB3838-2002）Ⅴ类标准。表7正常排放枯水期河流水质COD预测结果XY距排污口距离mCOD浓度mg/L2779.3915677.194032.58832733.1965600.1778027.37952746.5985524.47516027.23712793.3795481.17424024.60382861.9035459.63332024.59592934.4235371.96840024.57922964.8555292.28548024.56542925.9575399.84456024.58333097.55243.91264024.54863164.8085216.38472024.53633226.1115150.84180024.52593271.6395099.39888024.51823281.6165024.18496024.51063246.2254926.399104024.49843152.0994885.031116024.48273184.044665.965128024.47793252.4854574.919140024.44003320.0964487.159152024.43093387.84392.877164024.41993422.064287.012176024.40663494.3324193.382188024.39093574.6294125.289200024.37873588.1264016.141212024.36653549.9123914.379224024.35113544.5773704.631236024.31943548.8213602.458248024.30263571.4293481.56260024.28323586.6563269.814272024.25483455.8683045.696284024.21243546.3113883.305296024.34533234.4522793.439308024.14753115.4362768.076320024.12133002.1232760.519332024.08942898.3162767.018344024.07212793.8922749.621356024.05762695.9032686.315368024.04442613.1492675.764380024.03182421.2052786.248392024.00492321.052820.078404023.99072098.4052884.769416023.96012002.4972972.915428023.94361911.1143028.818440023.93031821.313139.958452023.91001725.0153172.721464023.89531616.6353189.927476023.87931518.9953190.323488023.85701419.0623124.835500023.83781320.1293088.413512023.82681201.4573025.849524023.80131108.6612969.082536023.78801014.132928.249548023.7738940.71992834.553560023.7538883.44242732.959572023.7331847.79232629.492584023.7195794.01752533.409596023.7084715.23842465.21608023.6912653.60792380.039623023.6767575.75592310.903638023.6632493.78122275.02653023.6523426.94732183.978668023.6558348.57032106.662683023.6249329.12010.004698023.6172331.9721910.561713023.6045334.17971815.018728023.5869362.76271700.742743023.5649348.53891602.797758023.5518299.60981509.245773023.5356216.53741434.64788023.5195177.07291341.155803023.5103159.06781245.875818023.4988148.51571136.397833023.4820132.38511031.644848023.4693119.0644938.1374863023.4590102.5849844.1205878023.4449103.9003741.1919893023.4353124.5333647.6315908023.4250207.7519588.6291923023.4053256.2318482.7068938023.3893253.7937380.5359953023.3735193.8566274.704968023.353684.05091209.4765983023.32665.049975139.3691998020.3659注：距排污口1040m为D4监测断面；距排污口9980m为D5控制断面D4监测断面D5控制断面本项目排污口D4监测断面D5控制断面本项目排污口图8枯水期正常排放河流水质COD预测浓度分布图

混合区范围本项目排污口混合区范围本项目排污口图9枯水期正常排放河流水质COD混合区范围图表8正常排放枯水期河流水质NH3-N预测结果XY距排污口距离mNH3-N浓度mg/L2779.3915677.19402.36022733.1965600.177800.78252746.5985524.4751600.84042793.3795481.1742400.36572861.9035459.6333200.37792934.4235371.9684000.37752964.8555292.2854800.37622925.9575399.8445600.37863097.55243.9126400.37443164.8085216.3847200.37413226.1115150.8418000.37343271.6395099.3988800.37293281.6165024.1849600.37243246.2254926.39910400.37163152.0994885.03111600.37093184.044665.96512800.36813252.4854574.91914000.36763320.0964487.15915200.36673387.84392.87716400.36653422.064287.01217600.36513494.3324193.38218800.36403574.6294125.28920000.36273588.1264016.14121200.36163549.9123914.37922400.36093544.5773704.63123600.35933548.8213602.45824800.35843571.4293481.5626000.35683586.6563269.81427200.35533455.8683045.69628400.35243546.3113883.30529600.36003234.4522793.43930800.34903115.4362768.07632000.34703002.1232760.51933200.34542898.3162767.01834400.34422793.8922749.62135600.34322695.9032686.31536800.34232613.1492675.76438000.34112421.2052786.24839200.33892321.052820.07840400.33812098.4052884.76941600.33602002.4972972.91542800.33441911.1143028.81844000.33311821.313139.95845200.33221725.0153172.72146400.33121616.6353189.92747600.33111518.9953190.32348800.33021419.0623124.83550000.32831320.1293088.41351200.32701201.4573025.84952400.32601108.6612969.08253600.32511014.132928.24954800.3243940.71992834.55356000.3238883.44242732.95957200.3221847.79232629.49258400.3205794.01752533.40959600.3206715.23842465.2160800.3200653.60792380.03962300.3186575.75592310.90363800.3145493.78122275.0265300.3170426.94732183.97866800.3157348.57032106.66268300.3150329.12010.00469800.3144331.9721910.56171300.3137334.17971815.01872800.3125362.76271700.74274300.3112348.53891602.79775800.3110299.60981509.24577300.3172216.53741434.6478800.3096177.07291341.15580300.3076159.06781245.87581800.3078148.51571136.39783300.3128132.38511031.64484800.3062119.0644938.137486300.3045102.5849844.120587800.3048103.9003741.191989300.3034124.5333647.631590800.3029207.7519588.629192300.3014256.2318482.706893800.2995253.7937380.535995300.2981193.8566274.70496800.297684.05091209.476598300.29655.049975139.369199800.2948注：距排污口1040m为D4监测断面；距排污口9980m为D5控制断面D5控制断面D4监测断面本项目排污口D5控制断面D4监测断面本项目排污口图10枯水期正常排放河流水质NH3-N预测浓度分布图本项目排污口混合区范围本项目排污口混合区范围图11枯水期正常排放河流水质NH3-N混合区范围图平水期水质预测结果及分析平水期，本项目正常排水排污口下游至D5断面COD预测浓度值范围为23.2967~27.8253mg/L，NH3-N预测浓度值范围为0.2807~2.2423mg/L。细河所在水功能区水质管理目标为Ⅴ类水质标准，本项目建成后，在正常工况下，平水期时，本项目排污口排入细河的COD、NH3-N影响现状水质的范围较小，并迅速扩散，可达到《地表水环境质量标准》（GB3838-2002）Ⅴ类标准。D4监测断面水质预测浓度为COD：24.0926mg/L、NH3-N：0.3415mg/L；D5控制断面（排污口下游9980m）水质预测浓度为COD：23.6316mg/L、NH3-N：0.2807mg/L，均可达到《地表水环境质量标准》（GB3838-2002）Ⅴ类标准。表9正常排放平水期河流水质COD预测结果XY距排污口距离mCOD浓度mg/L2779.3915677.194027.82532733.1965600.1778026.27882746.5985524.47516026.01882793.3795481.17424024.16112861.9035459.63332024.15622934.4235371.96840024.14552964.8555292.28548024.13652925.9575399.84456024.14803097.55243.91264024.12593164.8085216.38472024.11763226.1115150.84180024.11123271.6395099.39888024.10593281.6165024.18496024.10063246.2254926.399104024.09263152.0994885.031116024.08223184.044665.965128024.06423252.4854574.919140024.05613320.0964487.159152024.04843387.84392.877164024.04033422.064287.012176024.03143494.3324193.382188024.02153574.6294125.289200024.01383588.1264016.141212024.00563549.9123914.379224023.99463544.5773704.631236023.97203548.8213602.458248023.96143571.4293481.56260023.94783586.6563269.814272023.92743455.8683045.696284023.89993546.3113883.305296023.99023234.4522793.439308023.85703115.4362768.076320023.83953002.1232760.519332023.81982898.3162767.018344023.80842793.8922749.621356023.79922695.9032686.315368023.79062613.1492675.764380023.78192421.2052786.248392023.76292321.052820.078404023.75332098.4052884.769416023.73282002.4972972.915428023.72201911.1143028.818440023.71411821.313139.958452023.69931725.0153172.721464023.68841616.6353189.927476023.67681518.9953190.323488023.66181419.0623124.835500023.64851320.1293088.413512023.64081201.4573025.849524023.62291108.6612969.082536023.61371014.132928.249548023.6033940.71992834.553560023.5894883.44242732.959572023.5758847.79232629.492584023.5658794.01752533.409596023.5580715.23842465.21608023.5463653.60792380.039623023.5368575.75592310.903638023.5277493.78122275.02653023.5204426.94732183.978668023.5103348.57032106.662683023.5039329.12010.004698023.4965331.9721910.561713023.4872334.17971815.018728023.4753362.76271700.742743023.4594348.53891602.797758023.4501299.60981509.245773023.4395216.53741434.64788023.4285177.07291341.155803023.4216159.06781245.875818023.4130148.51571136.397833023.4012132.38511031.644848023.3924119.0644938.1374863023.3851102.5849844.1205878023.3755103.9003741.1919893023.3691124.5333647.6315908023.3615207.7519588.6291923023.3481256.2318482.7068938023.3373253.7937380.5359953023.3270193.8566274.704968023.313884.05091209.4765983023.29675.049975139.3691998023.6316注：距排污口1040m为D4监测断面；距排污口9980m为D5控制断面D4监测断面本项目排污口D5控制断面D4监测断面本项目排污口D5控制断面图12平水期正常排放河流水质COD预测浓度分布图本项目排污口混合区范围本项目排污口混合区范围图13平水期正常排放河流水质COD混合区范围图表10正常排放平水期河流水质NH3-N预测结果XY距排污口距离mNH3-N浓度mg/L2779.3915677.19402.24232733.1965600.177800.51642746.5985524.4751600.85262793.3795481.1742400.32992861.9035459.6333200.34602934.4235371.9684000.34622964.8555292.2854800.34542925.9575399.8445600.34843097.55243.9126400.34433164.8085216.3847200.34393226.1115150.8418000.34323271.6395099.3988800.34273281.6165024.1849600.34223246.2254926.39910400.34153152.0994885.03111600.34093184.044665.96512800.33943252.4854574.91914000.33843320.0964487.15915200.33813387.84392.87716400.33723422.064287.01217600.33633494.3324193.38218800.33563574.6294125.28920000.33493588.1264016.14121200.33413549.9123914.37922400.33343544.5773704.63123600.33183548.8213602.45824800.33103571.4293481.5626000.33003586.6563269.81427200.32863455.8683045.69628400.32673546.3113883.30529600.33243234.4522793.43930800.32333115.4362768.07632000.32203002.1232760.51933200.32122898.3162767.01834400.31972793.8922749.62135600.31892695.9032686.31536800.31822613.1492675.76438000.31742421.2052786.24839200.31582321.052820.07840400.31492098.4052884.76941600.31312002.4972972.91542800.31201911.1143028.81844000.31131821.313139.95845200.31041725.0153172.72146400.30971616.6353189.92747600.30891518.9953190.32348800.30801419.0623124.83550000.30701320.1293088.41351200.30611201.4573025.84952400.30491108.6612969.08253600.30431014.132928.24954800.3034940.71992834.55356000.3029883.44242732.95957200.3017847.79232629.49258400.3008794.01752533.40959600.3000715.23842465.2160800.2994653.60792380.03962300.2985575.75592310.90363800.2979493.78122275.0265300.2971426.94732183.97866800.2963348.57032106.66268300.2956329.12010.00469800.2950331.9721910.56171300.2945334.17971815.01872800.2935362.76271700.74274300.2926348.53891602.79775800.2919299.60981509.24577300.2912216.53741434.6478800.2904177.07291341.15580300.2898159.06781245.87581800.2892148.51571136.39783300.2885132.38511031.64484800.2878119.0644938.137486300.2872102.5849844.120587800.2865103.9003741.191989300.2859124.5333647.631590800.2853207.7519588.629192300.2843256.2318482.706893800.2835253.7937380.535995300.2828193.8566274.70496800.282184.05091209.476598300.28125.049975139.369199800.2807注：距排污口1040m为D4监测断面；距排污口9980m为D5控制断面D5控制断面D4监测断面本项目排污口D5控制断面D4监测断面本项目排污口图14平水期正常排放河流水质NH3-N预测浓度分布图本项目排污口混合区范围本项目排污口混合区范围图15平水期正常排放河流水质NH3-N混合区范围图丰水期水质预测结果及分析丰水期，本项目正常排水排污口下游至D5断面COD预测浓度值范围为23.0243~27.7601mg/L，NH3-N预测浓度值范围为0.2716~2.1573mg/L。细河所在水功能区水质管理目标为Ⅴ类水质标准，本项目建成后，在正常工况下，丰水期时，本项目排污口排入细河的COD、NH3-N影响现状水质的范围较小，并迅速扩散，可达到《地表水环境质量标准》（GB3838-2002）Ⅴ类标准。D4监测断面水质预测浓度为COD：23.9212mg/L、NH3-N：0.3231mg/L；D5控制断面（排污口下游9980m）水质预测浓度为COD：23.0243mg/L、NH3-N：0.2716mg/L，均可达到《地表水环境质量标准》（GB3838-2002）Ⅴ类标准。表11正常排放丰水期河流水质COD预测结果XY距排污口距离mCOD浓度mg/L2779.3915677.194027.76012733.1965600.1778026.66822746.5985524.47516026.24532793.3795481.17424023.99712861.9035459.63332023.99232934.4235371.96840023.98062964.8555292.28548023.97082925.9575399.84456023.98303097.55243.91264023.95893164.8085216.38472023.94943226.1115150.84180023.94203271.6395099.39888023.93613281.6165024.18496023.93013246.2254926.399104023.92123152.0994885.031116023.90933184.044665.965128023.88903252.4854574.919140023.87983320.0964487.159152023.87113387.84392.877164023.86193422.064287.012176023.85173494.3324193.382188023.84053574.6294125.289200023.83183588.1264016.141212023.82243549.9123914.379224023.81043544.5773704.631236023.78523548.8213602.458248023.77323571.4293481.56260023.75813586.6563269.814272023.73623455.8683045.696284023.70423546.3113883.305296023.80573234.4522793.439308023.65653115.4362768.076320023.63713002.1232760.519332023.61442898.3162767.018344023.60172793.8922749.621356023.59132695.9032686.315368023.58162613.1492675.764380023.57202421.2052786.248392023.55062321.052820.078404023.53972098.4052884.769416023.51642002.4972972.915428023.50411911.1143028.818440023.49481821.313139.958452023.47851725.0153172.721464023.46651616.6353189.927476023.45381518.9953190.323488023.43701419.0623124.835500023.42181320.1293088.413512023.41341201.4573025.849524023.39291108.6612969.082536023.38251014.132928.249548023.3712940.71992834.553560023.3555883.44242732.959572023.3401847.79232629.492584023.3291794.01752533.409596023.3205715.23842465.21608023.3074653.60792380.039623023.2969575.75592310.903638023.2869493.78122275.02653023.2787426.94732183.978668023.2672348.57032106.662683023.2605329.12010.004698023.2528331.9721910.561713023.2429334.17971815.018728023.2291362.76271700.742743023.2123348.53891602.797758023.2021299.60981509.245773023.1902216.53741434.64788023.1779177.07291341.155803023.1709159.06781245.875818023.1614148.51571136.397833023.1486132.38511031.644848023.1388119.0644938.1374863023.1305102.5849844.1205878023.1200103.9003741.1919893023.1128124.5333647.6315908023.1044207.7519588.6291923023.0895256.2318482.7068938023.0773253.7937380.5359953023.0656193.8566274.704968023.050784.05091209.4765983023.03115.049975139.3691998023.0243注：距排污口1040m为D4监测断面；距排污口9980m为D5控制断面D4监测断面本项目排污口D5控制断面D4监测断面本项目排污口D5控制断面图16丰水期正常排放河流水质COD预测浓度分布图本项目排污口混合区范围本项目排污口混合区范围图17丰水期正常排放河流水质COD混合区范围图表12正常排放丰水期河流水质NH3-N预测结果XY距排污口距离mNH3-N浓度mg/L2779.3915677.19402.15732733.1965600.177800.42832746.5985524.4751600.72182793.3795481.1742400.32122861.9035459.6333200.32682934.4235371.9684000.32702964.8555292.2854800.32572925.9575399.8445600.32803097.55243.9126400.32493164.8085216.3847200.32533226.1115150.8418000.32423271.6395099.3988800.32333281.6165024.1849600.32313246.2254926.39910400.32313152.0994885.03111600.32213184.044665.96512800.32123252.4854574.91914000.32013320.0964487.15915200.31953387.84392.87716400.31933422.064287.01217600.31843494.3324193.38218800.31763574.6294125.28920000.31743588.1264016.14121200.31663549.9123914.37922400.31583544.5773704.63123600.31423548.8213602.45824800.31393571.4293481.5626000.31283586.6563269.81427200.31163455.8683045.69628400.30983546.3113883.30529600.31523234.4522793.43930800.30703115.4362768.07632000.30593002.1232760.51933200.30522898.3162767.01834400.30412793.8922749.62135600.30352695.9032686.31536800.30292613.1492675.76438000.30212421.2052786.24839200