The difference between freshwater lakes and saltwater lakes, is there a contradictory relationship b

The differences between freshwater and saltwater lakes are as follows:

1. The definitions are different. Freshwater lakes are lakes that accumulate on the surface in the form of fresh water; A saltwater lake is a lake with a high salt content.

2. The reasons for the formation are different. Freshwater lakes are formed by the accumulation of fresh water on the earth's surface, and saltwater lakes are formed for two reasons, the first is the remains of ancient oceans, and the second is that they are located at the tail end of inland rivers.

3. The water flow of the lake is different. Saltwater lakes are mostly inland, and the water flow cannot eventually flow into the sea; Freshwater lakes are mostly outflow lakes that eventually flow into the sea.

4. The distribution is different. Saltwater lakes are mainly found in dry endflow areas, while freshwater lakes can be found in multiple areas.

5. The degree of salinity is different. The salinity of saltwater lakes is greater than 1 gram liter and that of freshwater lakes is less than 1 gram liter.

Freshwater lakes and saltwater lakes are not contradictory.

Freshwater lakes refer to lakes that accumulate on the surface in the form of fresh water, and are divided into two types: closed and open: closed freshwater lakes are large.

Most of them are located in high mountains or inland areas, and there are no significant rivers flowing in and out.

Saltwater lakes refer to lakes with high salt content (generally more than 1/1000 is saltwater lakes). Usually the lake water is not discharged or the discharge is not smooth, and the salt enrichment of the lake water is caused by evaporation, so it is mostly formed in the dry inflow area.

Water utilization

Salinity in saltwater lakes is generally 1 35 g liters. The chemical composition of the lake water is mostly chloride, the salinity is high, and the hardness is also greater than that of freshwater lakes. The hydrochemical state of the lake water depends on the hydrological dynamics of the rivers flowing into the lake.

The chemical condition of the lake water varies greatly, and it can be diverted with the diversion of the river, and the lake water will be light and sometimes salty for several years, such as the famous Lop Nur.

China's saltwater lakes are generally mesotrophic or oligotrophic lakes, and most of them are developing in the direction of concentration, and the salinity has a tendency to increase. Saltwater lakes contain macroelements.

In addition, some are also rich in trace elements.

I believe everyone knows that the difference between freshwater lakes and saltwater lakes is quite big, so what is the difference between freshwater lakes and saltwater lakes? There are two types of freshwater lakes, which are open and closed, if they are closed freshwater lakes, most of them are in the mountains or inland, and there will be no obvious rivers flowing in or out. Saltwater lake means that the salt content in the lake is high, under normal circumstances, more than one thousandth can be called a saltwater lake, generally the lake water will not be discharged, or the discharge is not very smooth, and then evaporate to form the salt in the lake water to accumulate, most of which will be formed in the dry inflow area.

1. Freshwater lake

Freshwater lakes are divided into two types: closed and open: closed freshwater lakes are mostly located in high mountains or inland areas, with no obvious river inflow and outflow; Open freshwater lakes can be quite large, with islands and multiple rivers flowing into and out. Freshwater lakes are generally outflow lakes; Because the water source can be renewed, the water in the freshwater lake is very low in salinity.

2. Saltwater lakes.

The salinity of the water is more than 1. Among them, brackish water lakes with a salinity of between 1% and brackish water lakes with a salinity content greater than them. It is formed in arid areas with strong evaporation and no water discharge.

1. Freshwater lakes in China.

China's well-known freshwater lakes include Poyang Lake, Dongting Lake, Taihu Lake, Hongze Lake, Hulun Lake, Chaohu Lake, Gaoyou Lake, Weishan Lake, Honghu Lake, Hengshui Lake, etc., mainly distributed in the middle and lower reaches of the Yangtze River Plain, the lower reaches of the Huai River and the southern part of Shandong, and the lake area in this area accounts for about one-third of the total lake area of the country.

The largest man-made freshwater lake in Asia is the Danjiangkou Reservoir and the source of water for the middle route of China's South-to-North Water Diversion Project.

2. Distribution of saltwater lakes.

China's saltwater lakes are mainly distributed in the western region, and are far more numerous than freshwater lakes, accounting for about 55% of the total lake area in the country. The largest and most famous of these is "Qinghai Lake".

Qinghai Lake is also known as "Kukunuoer", which means "blue sea" in Mongolian. It is located in the Qinghai Lake Basin in the northeastern part of Qinghai Province and is the largest inland lake in China. It is 105 kilometers long, 63 kilometers wide, and reaches a maximum depth of 38 meters, with a catchment area of about 29,661 kilometers and an elevation of 3,196 meters above sea level.

It is nearly 450km larger than Poyang Lake, the largest freshwater lake in China. The lake is mainly recharged by surface runoff and lake precipitation. There are more than 40 rivers entering the lake, mainly including Buha River, Bago Ulan River, Side River, etc., among which the Buha River is the most respectful source.

In recent years, due to the continuous change of climate, the lake water has also been declining, and the lake level has gradually shrunk, compared with the initial lake area, the lake has shrunk by nearly 1 3, and the water level has been reduced by 80 100 meters.