典型情境下西安市雨水利用量分析

发布时间：2018-02-17 07:06

  本文关键词： 雨水收集 最优容积 绿地率 面积率 径流控制率　出处：《西安建筑科技大学》2016年硕士论文　论文类型：学位论文

【摘要】：本文根据西安市实际特征,选择四种不同区域为研究对象,并结合西安市降雨资料分别对四种不同情景下利用相关雨水收集设施进行雨水收集时的雨水可收集利用量进行分析计算,得到如下结论:1.以农村单户家庭进行雨水收集利用时,以蓄水池作为雨水收集利用设施,通过对西安市日降雨量数据进行分析,建立日水量平衡模型,以家庭人口4人,集雨面积200m2的典型关中农村单户家庭为例,对其补给率和可靠性进行分析,结果表明雨水池的最优容积为25m3。2.以建筑小区为研究对象,以绿地和雨水调蓄池进行雨水收集利用。结果表明当小区绿化率达到36%时,仅靠绿地下渗小区径流控制率即可达到80%。以占地4万m2,绿地率25%的建筑小区为例,雨水调蓄池的最优容积为500m3,此时径流控制率为86%。3.以西安市市政道路为研究对象,雨水收集利用设施采用下凹式绿地。结果表明,市政道路下凹绿地的蓄渗效率与绿地下凹深度、绿地宽度比等有关,渗蓄效率随下凹深度、绿地宽度比增加而增加。以西安市建成区道路面积为例,在市政道路绿地宽度比为30%,绿地全部下凹50mm的情况下,渗蓄率可以达到86.27%,平均每年可渗蓄约144万立方雨水。4.以生态停车场进行雨水收集利用。不换土的情况下,下凹深度取h=5~15cm时,要控制20mm的雨量,不同渗透系数下所需要的设施面积率为7%~30%;换土的情况下,下凹深度取h=5~15cm时,要控制20mm的雨量,不同渗透系数下所需要的设施面积率为2%~18%。在不同面积率下,计算出西安市控制径流量与控制率的关系,在控制降雨径流量相同的情况下,面积率越大,对应的控制率越高。以某一停车场为示例进行设计,措施面积率为4.8%,其结果表明控制降雨量为22mm,径流控制率可达到81%。
[Abstract]:According to the actual characteristics of Xi'an city, this paper chooses four different regions as the research object. Combined with the rainfall data of Xi'an City, respectively, the collection and utilization amount of Rain Water collected by relevant Rain Water collection facilities under four different scenarios was analyzed and calculated, and the following conclusion was drawn: 1.The collection and utilization of Rain Water in rural single-family households were analyzed and calculated. Taking the reservoir as the collection and utilization facility of Rain Water, by analyzing the daily rainfall data in Xi'an, a daily water balance model is established. The typical Guanzhong rural single-family household with a household population of 4 people and a rainfall catchment area of 200 m2 is taken as an example. The results show that the optimal volume of Rain Water Pond is 25m3.2.The green space and Rain Water storage tank are used as the research objects. The results show that when the green rate of the area reaches 36m, The runoff control rate can reach 80 by using only green land infiltration plot. Taking the construction district with an area of 40,000 m2 and a green space rate of 25% as an example, the optimal volume of Rain Water storage pool is 500m3, and the runoff control rate is 86.3. taking Xi'an municipal road as the research object, Rain Water used concave green space to collect and utilize the facilities. The results showed that the storage efficiency of concave green land on municipal roads was related to the depth and width ratio of green space, and the efficiency of seepage and storage was accompanied by concave depth. Taking the road area of the built area of Xi'an city as an example, when the ratio of green space width of municipal road is 30, and the total green space is concave by 50 mm, The rate of infiltration and storage can reach 86.27, and the average annual storage capacity is about 1.44 million cubic Rain Water .4.The collection and utilization of Rain Water are carried out in an ecological parking lot. Without changing soil, the rainfall of 20mm should be controlled when the depth of the pit is taken at a depth of 5cm or 15cm. The required area rate of facilities under different permeability coefficients is 7 / 30. In the case of changing soil, the rainfall of 20mm should be controlled when the depth of the depression is 5 ~ 15cm, and the area ratio of the facilities required under different permeability coefficients is 2 / 18. Under different area rates, the rainfall of 20 mm should be controlled when the depth of the pit is taken at a depth of 5 ~ 15 cm. The relationship between the controlled runoff and the control rate in Xi'an is calculated. The larger the area rate is, the higher the corresponding control rate is when the rainfall runoff control is the same. Take a parking lot as an example to design, The measure area ratio is 4.8. The results show that the controlled rainfall is 22 mm and the runoff control rate can reach 81 mm.
【学位授予单位】：西安建筑科技大学
【学位级别】：硕士
【学位授予年份】：2016
【分类号】：TU992;TV213.9
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本文编号：1517499