供水工程经济案例分析

水利工程经济案例分析 专业： 班级： 姓名：一）.基本资料某供水泵站灌溉工程设计供水面积40.4,装机94台,装机容量3.2万抽水流量净扬程103.66m.:(表1)；本工程于1975,1976,1983成,1986年底全部竣工,逐步进入管理期.工程运行期年管理总成本(含折旧费,大修,维修,管理及运行电费)和年总费用如表:(表,养殖业)B:(3)二）.经济分析计算(一)现值计算:经济计算期和基准年确定55:20～25.1975200026年1983年开始部分受益年作为基准年(1)所示.,:,K mk0 0

(1i)Tn0

k j(1i)t式中:T—基准年以前某年至基准年的年数；Ki—基准年以前i年的投资T—基准年以后某年至基准年的年数；Kj—基准年以后j年的投资I—利率,本工程采用i=7%于是可算得:1975年投资的折现值为:F75=K(F/P,i%,n)=142.49(F/P,7%,8)=1.429*1.718万元1976年投资的折现值: F76=k(F/P,7%,7)=326.45*1.606=527.49万同样可以求出77～82年各年投资的现值,如(表4)所列.1984年投资的折现值为:P84=K(P/F,i%,n)=2735.48(P/F,7%,1)=2735.48*0.9346=2556.58万元同样可以求出85～86年各年投资的现值,如(表4)所列.2)工程费用折算到基准年的现值因为工程费用发生在基准年83年之后,所以利用公式:P=F/(1+i)n=F(P/F,i%,n)1983年费用的折现值: P83=166.46(P/F,7%,0)=166.46×1=166.46万元1984年费用的折现值: P84=280.36(P/F,7%,1)=万元1985～2000如(所列1983～2000如(所列工程效益折算到基准年的现值因为工程效益发生在基准年之后,所以计算如下：1983年效益折现值: P83=211.02(P/F,7%,1)=211.02×1=211.02万元1984年效益的折现值: P84=645.55(P/F,7%,1)=万元同理可以求出各年的效益折现值,如(表5)所列(二)经济分析静态分析1)工程的还本年限：T=K/(B-C)=13066.871/(3840.8-496.94)=4(年)效益费用比 K=B/C=60957.27/8232.29=7.4动态分析效益费用比 由公:R0=B0/(K0+C0)知本工程效益现值总和B0=30978.52万元；本工程投资现值总和K0=14130.11本工程费用现值总和C0=11685.57万元；R0=30978.52/(14130.11+11685.57)=1.2净效益现值净效益现: P0=B0-(K0+C0)=30978.52-(14130.11+11685.57)=5162.84万元内部回收率K0=B0-C0,i,KB-C如(6),(7).i.将表中合计栏的各K0B0-C0值(KO～i)和(B0-C0)～i如图:(2),i13.25,13.25%>7%.按内部回收率的倒数计算. T=1/i=1/0.1325=7.55年(三)工程分析评价通过上述分析计算,本工程修成后工程的还本年限小于15年,内部回收率大于7%,效益费用比大于1,所以经济上是合理的,效益也是显著的.所有的计算成果均以计算机自动计算并输出予以实现。年份投资 额占地赔偿国家年份投资 额占地赔偿国家劳务合计1975106.7935.7142.491976246.1682.29328.451977442.9148.0850641.051978499.49166.4760726.461979905.75302.78701278.531980960.26321651346.261981410.87137.3570618.221982424.35141.8580646.21983371.78410.48150932.261984770195.48501015.4819856341621.3821.992277.3719861161078.1011194.101合计13066.871表2 年总成本和总费用C单位:万元,万亩费用年份灌溉面积电费折旧费大修费维修费管理费总成本总费用1983769.4132.639.7818.538.72299.06166.46198418177.62151.6745.518.538.72632.03280.36198526273.21177.1253.1418.538.72560.71283.59198635340.49198.1559.4518.538.72655.33437.16198738.5373.0120260.618.538.72693.85191.85198840.4379.6420260.618.538.72699.48497.48198940.4387.2720260.618.538.72707.11505.11199040.4386.2620260.618.538.72706.1504.1199140.4385.2620260.618.538.72705.1503.1199240.4383.6220260.618.538.72706.46501.46199340.438220260.618.538.72701.84499.84199440.4380.420260.618.538.72700.24498.24199540.4379.4420260.618.538.72699.28497.28199640.4377.2920260.618.538.72697.08495.48199740.4373.8520260.618.538.72693.69491.69199840.4371.1220260.618.538.72690.96488.96199940.4369.0320260.618.538.72688.87486.87200040.4365.820260.618.538.72685.64483.64项目年投资K项目年投资K距基i=5%i=7%i=9%i=11%i=13%i=15%合计6154.73487.54 6554.4911719.838232.3表3 年 效 益 单位万元年份总效益B净效益B-C年份总效益B净效益B-C1983211.0244.5619924019.973590.511984645.35365.1919934219.933720.0919851256.04872.4519944347.943849.719861788.421331.2419954456.93959.6219872133.301641.4519964587.034091.9519882748.172250.6919974699.04207.3119893317.632812.5219984815.154326.1919903840.803336.3619994833.364346.4919913941.143478.0420004983.924500.28工程总效益B=60957.27万元年份距基准i=7%的年份距基准i=7%的折现值表4 各年投资折年份距基准i=7%的年份距基准i=7%的折现值年年数折现值年年数19758244.8319812707.819767527.4919821691.4319776962.02198301132.26197851018.9198412556.58197941675.9198521989.05198031649.1719863974.75表5 费用,成本及效益折合现值 i=7% 单位万元项目年份距基准年年数 年总费用C折现值年总成本折现值年效益折现值19830 166.46299.06211.0219841 262.02403.78603.3319852 335.03489.721097.0319863 373.2534.951459.8919874 375.23529.341627.4919885 354.7498.731959.4419896 336.55471.152210.5419907 313.9439.692931.6719918 292.81410.382317.0619929 272.74382.612225.62199310 254.07350.752144.99199411 236.71332.682065.71199512 220.79310.481978.86199613 205.46289.291903.62199714 190.68269.011822.27199815 177.20250.41705.01199916 164.9233.321637.06200017 153.12217.071577.91合计4655.576118.4130978.52表6 不同利率时工程投资折现值单位:万元年份准年1975142.498210.52244.83283.92328.37378.80435.881976328.457462.16527.42600.42681.91772.71873.681977641.056859.07962.021075.111199.031334.641482.781978726.465927.171018.901117.751224.131338.461416.1719791278.5341554.061675.901804.751940.92084.612236.1619801346.2631558.461649.171743.451841.191942.512047.491981618.222681.597070.89734.51761.71789.41817.601982616.201678.51691.43704.36717.28730.21743.1319831132.2601132.261132.261132.261132.261132.261132.2619842735.4812605.222556.582509.611464.402420.782378.6819852277.3722605.641989.051916.821848.361783.511722.0219861194.1031031.51974.75922.07873.12827.571816.08合计13066.87113766.1714130.1114545.0315012.6515535.4717146.94表-7 不同利率时B-C折现值 单位万元项目年总效 年总 B-C 距i=5% i=7% i=9%i=11%i=13%i=15%年份益B费用C基准年1983211.02166.4644.56044.5644.5644.5644.5644.5644.561984645.55280.36365.191347.80341.30335.04829.00323.18317.5219851256.04383.59872.452791.34762.00734.32708.10683.26659.7019861788.42457.181331.2431149.981086.691027.96973.39922.62875.3119872133.30491.851641.4541350.421252.261162.841081.271006.73938.5019882748.17497.482250.6951763.471604.741462.791335.671221.581118.8919893317.63505.112812.5262098.751873.991677.011503.691350.91215.931990384.080504.103336.7072371.332077.771825.291607.151418.301254.3919913981.14503.10478.0482354.072024.251745.511509.211308.301136.9819924019.97501.463590.5192314.471952.881653.171403.621195.231020.6519934219.93499.843720.09102283.811890.921571.411310.161095.90919.5519944347.94498.243849.70112250.8418921491.891221.451003.61827.4719954456.90497.283959.62122204.861758.071407.781131.82913.51740.0819964587.03495.084091.95132170.051698.161334.711053.7483