Agricultural activity, increase

The influence of human activities in a stream drainage basin can be relatively simple and direct, as in the disposal of soluble organic and inorganic waste, or more subtie and complex, as in the conversion of prairie or forest land to agricultural use. Such effects can be expected to increase as population density and agricultural, industrial, and mining activities increase. 

This high agriculture activity compromises the chemical and ecological status of the Ebro delta. Pesticides used in the area migrate into the delta building up, together with the pollution produced by some industries, a contamination that can be dangerous to its both fauna and flora, and this contamination increases when water from the rice fields is drained into the delta [17]. 

A variety of human activities increase erosion and sedimentation rates. For example, soil typically erodes from cultivated land five to 10 times as fast as from noncultivated land. Construction sites lose soil 100 times as fast and mined land more than 500 times as fast as land that is undisturbed. Besides greatly increasing water pollution, this erosion accelerates the loss of valuable farmland. By some estimates, as much as 3.3 billion tons (3 billion metric tons) of topsoil is lost to such processes in the United States each year. Overall, the major anthropogenic sources of erosion (and, as a consequence, sedimentation) are certain types of agriculture (such as row cropping), livestock operations, logging, flooding from developed land, and construction projects. 

Industrialization and need for increase in agricultural activity, 1-2 Inosine monophosphate, taste enhancer, 17,19 Interdroplet forces, effect on centrifugal stability for protein-stabilized oil-in-water emulsions,... 

Water pollution may be caused by agricultural activities and has increased continually over the last few years. A wide variety of pesticides reach the soil in the agricultural areas where they are applied, but they can also be carried off by leaching as a consequence of water displacement in the soil environment or runoff (4-6). Some of this surface and groundwater is supplied as drinking water because of this, it is necessary to screen them for pesticide contamination. 

Metals have been used throughout much of human history to make utensils, machinery, and so on, and mining and smelting supplied metals for these uses. These activities increased environmental levels of metals. More recently metals have found a number of uses in industry, agriculture, and medicine. These activities have increased exposure not only to metal-related occupational workers but also to consumers of the various products. 

Furthermore, urbanization means a significant increase in the surfaces without vegetation such as asphalt and building cover. Surface conditions could substantially influence the residence time and fate of POPs in a system. Agricultural activities, of which the dominant activity is rice cultivation, occur primarily in the western and southern areas of the South Korean peninsula. Thus, the water quality of the inland rivers is associated with OCP use history and agricultural products contamination in South Korea. 

---