Infiltration is one of the most important hydrological process through which water enters the soil surface and plays a significant role in controlling soil water storage, crop yields, irrigation efficiency and solute entry into the soil profile. In agriculture fields, generally, the top soils are enriched with high organic matter and clay, particularly in black soils that promotes sorption, biological degradation and transformation of contaminants. During the process some of the chemicals applied to farm land, move down with the deep percolating water from the root zone and there are likely chances to pollute the underlying ground water. Such instances are reported by locals in areas dominated by black soils of Malaprabha command area. In order to understand the extent of groundwater contamination through chemical fertilizers, insecticides and manures, two agricultural plots (sugarcane and banana plantation) have been identified in parts of Malaprabha command area covering parts of Saundatti, Ramdurg (Belagavi district) and Nargund taluks (Gadag district). Hydraulic properties such as infiltration and hydraulic conductivity were determined in the field. Soil samples were collected and analysed in the laboratory for texture and porosity. The study indicated that the soils of the region are layered in structure. Further, it is noticed that the coarse textured loamy soil is present below the fine textured soils (such as silty loam or clayey loam). Due to the presence of fine soils at the top, the irrigated water get accumulated and the evaporation takes place relatively faster and results in the accumulation of excess salt. It is also noticed that the layered soils have obvious effects on solute transport and salt accumulation in the clay rich soil layer at the interface. The average salt accumulation (Total Nitrogen) observed in the study area within soil profile is 18.7g/kg. The maximum salt accumulation (21.38 g/kg) occurred in the top layer of sugarcane plots followed by banana plantation (19.85 g/kg). It is also noticed that there are remarkable changes in the interlayered soils with reference to water infiltration characteristics and salt leaching intensities. Study revealed the fact that the properties of the soil profile with a silty loam interlayer is better than with a silty clay loam interlayer.

入渗是最重要的水文过程之一，水通过该过程进入土壤表面，并在控制土壤水的储存，作物产量，灌溉效率和溶质进入土壤剖面中发挥重要作用。通常，在农业领域中，表层土壤富含高有机质和粘土，尤其是在黑色土壤中，其促进了吸附，生物降解和污染物转化。在此过程中，一些化学药品会运用于农田，随着根部区域的深层渗滤水而向下移动，并且很可能会污染下面的地下水。当地人在马拉帕布拉（Malaprabha）指挥区的黑土占主导的地区报告了这种情况。为了了解化学肥料对地下水的污染程度，杀虫剂和肥料，已在马拉帕布拉（Malaprabha）指挥区的部分地区确定了两个农业用地（甘蔗和香蕉种植园），覆盖了Saundatti，Ramdurg（Belagavi区）和Nargund taluks（Gadag区）的部分地区。在现场确定了诸如渗透和水力传导率的水力特性。收集土壤样品并在实验室中分析其质地和孔隙率。研究表明该地区的土壤在结构上是分层的。此外，应注意的是，粗纹理壤土存在于细纹理土壤（例如粉质壤土或黏土壤土）之下。由于顶部存在细土，灌溉水积聚并且蒸发发生得相对较快，并导致多余盐分的积聚。还应注意的是，层状土壤对界面处富含粘土的土壤层中的溶质运移和盐分累积具有明显的影响。在研究区域内，土壤剖面内的平均盐分累积（总氮）为18.7g / kg。最大的盐累积量（21.38 g / kg）发生在甘蔗地块的顶层，其次是香蕉种植（19.85 g / kg）。还应注意的是，考虑到水的渗透特性和盐分浸出强度，层间土壤发生了显着变化。研究表明，粉质壤土夹层的土壤剖面特性要好于粉质壤土夹层的土壤剖面。在研究区域内，土壤剖面内的平均盐分累积（总氮）为18.7g / kg。最大的盐累积量（21.38 g / kg）发生在甘蔗地块的顶层，其次是香蕉种植（19.85 g / kg）。还应注意的是，考虑到水的渗透特性和盐分浸出强度，层间土壤发生了显着变化。研究表明，粉质壤土夹层的土壤剖面特性要好于粉质壤土夹层的土壤剖面。在研究区域内，土壤剖面内的平均盐分累积（总氮）为18.7g / kg。最大的盐累积量（21.38 g / kg）发生在甘蔗地块的顶层，其次是香蕉种植（19.85 g / kg）。还应注意的是，考虑到水的渗透特性和盐分浸出强度，层间土壤发生了显着变化。研究表明，粉质壤土夹层的土壤剖面特性要好于粉质壤土夹层的土壤剖面。还应注意的是，考虑到水的渗透特性和盐分浸出强度，层间土壤发生了显着变化。研究表明，粉质壤土夹层的土壤剖面特性要好于粉质壤土夹层的土壤剖面。还应注意的是，考虑到水的渗透特性和盐分浸出强度，层间土壤发生了显着变化。研究表明，粉质壤土夹层的土壤剖面特性要好于粉质壤土夹层的土壤剖面。