Water quality deterioration took place during infiltration process. Quality of the source water, climate conditions and amounts of added water are the major role players of the differentiation measures. Treated wastew...Water quality deterioration took place during infiltration process. Quality of the source water, climate conditions and amounts of added water are the major role players of the differentiation measures. Treated wastewater, rainwater and fresh groundwater were described within this study. It was found that the rainwater has an aggressive behavior with a high ability to dissolve soil salts. The amounts of Total Dissolved Solids (TDS) increase with infiltration process. Electrical conductivity (EC) increased by 600%. Plotting the fresh groundwater to the same conditions and experiment reflects the ability of this water to dissolve soil salts and increases the TDS by increasing the EC by a percentage of around 200%;while applying lower quality of water, the percentage of the EC of the treated wastewater increases to about 230% for the depth of 20 cm, which indicates the accumulation of the salts within this part of the soil, which leads to the deterioration of the soil quality, and decreases to about 160% for a depth of 60 cm. This differentiation could be a result of low permeability soils which tend to accumulate salts as a result of evaporation and then increase the salinity in the topsoil. Dissolution and plant uptake in the infiltrated take of minerals save the soil’s water from evaporation and do not allow salts to concentrate in soils. Moreover, plant uptake of soil water chemicals causes a decrease in some salt concentrations such as NO3, PO4, K, Na, and Cl and may conserve others.展开更多
硫酸盐渍土地区路基盐胀等病害易发且种类多样,病害的发生与盐渍土中含水率和含盐量有很大关系,同时不同含水率和含盐量引起的吸力值变化对其也有较大影响.为研究硫酸盐渍土中吸力值与含盐量和体积含水率的关系,以室内配置硫酸盐渍土作...硫酸盐渍土地区路基盐胀等病害易发且种类多样,病害的发生与盐渍土中含水率和含盐量有很大关系,同时不同含水率和含盐量引起的吸力值变化对其也有较大影响.为研究硫酸盐渍土中吸力值与含盐量和体积含水率的关系,以室内配置硫酸盐渍土作为研究对象,通过滤纸法测定不同含盐量和体积含水率下的硫酸盐渍土的吸力值,并绘制不同含盐量条件下的土水特征曲线和建立渗透吸力与含盐量、体积含水率之间的关系.结果表明:在一定范围内,体积含水率与总吸力之间呈指数关系;渗透吸力=f(含盐量,体积含水率)的拟合模型确定为Linear model Poly 21.展开更多
文摘Water quality deterioration took place during infiltration process. Quality of the source water, climate conditions and amounts of added water are the major role players of the differentiation measures. Treated wastewater, rainwater and fresh groundwater were described within this study. It was found that the rainwater has an aggressive behavior with a high ability to dissolve soil salts. The amounts of Total Dissolved Solids (TDS) increase with infiltration process. Electrical conductivity (EC) increased by 600%. Plotting the fresh groundwater to the same conditions and experiment reflects the ability of this water to dissolve soil salts and increases the TDS by increasing the EC by a percentage of around 200%;while applying lower quality of water, the percentage of the EC of the treated wastewater increases to about 230% for the depth of 20 cm, which indicates the accumulation of the salts within this part of the soil, which leads to the deterioration of the soil quality, and decreases to about 160% for a depth of 60 cm. This differentiation could be a result of low permeability soils which tend to accumulate salts as a result of evaporation and then increase the salinity in the topsoil. Dissolution and plant uptake in the infiltrated take of minerals save the soil’s water from evaporation and do not allow salts to concentrate in soils. Moreover, plant uptake of soil water chemicals causes a decrease in some salt concentrations such as NO3, PO4, K, Na, and Cl and may conserve others.
文摘硫酸盐渍土地区路基盐胀等病害易发且种类多样,病害的发生与盐渍土中含水率和含盐量有很大关系,同时不同含水率和含盐量引起的吸力值变化对其也有较大影响.为研究硫酸盐渍土中吸力值与含盐量和体积含水率的关系,以室内配置硫酸盐渍土作为研究对象,通过滤纸法测定不同含盐量和体积含水率下的硫酸盐渍土的吸力值,并绘制不同含盐量条件下的土水特征曲线和建立渗透吸力与含盐量、体积含水率之间的关系.结果表明:在一定范围内,体积含水率与总吸力之间呈指数关系;渗透吸力=f(含盐量,体积含水率)的拟合模型确定为Linear model Poly 21.
