Gisk () g Desertification, as defined by ISSN: X United Nations Conference, has a strong impact on hydrological conditions, environment and development. The ecological environment in the middle and lower reaches even leads to land degradation in arid areas. The repeated occurrence of the Yellow River drying up since the semi-arid and semi humid arid area is the result of the joint action of many factors, including climate change, which leads to the exchange of soil between human beings in the source area of the Yellow River In depth study on the ecological environment problems of desertification rivers: in the northeast of Qinghai Province, the geographical location and ecological environment of Tibet are not only a special ecological problem of Qinghai Province, but also a major threat to its ecological environment.
In recent years, due to natural factors and human activities, Tibet's geographical location and ecological environment problems are not only a special ecological problem in Qinghai Province, but also a major threat to its ecological environment In the past, the research on desertification mainly concentrated in Gonghe basin, lacking systematic study on the distribution of land desertification in the whole region. According to the field survey in September and Landsat, the desertification degradation rate is very fast TM images and band data show that the desertification land in the study area is mainly concentrated in Gonghe Basin and hilly plain area. In the source area of the Yellow River, the total area of desertification land is km or total area.
吉斯克（）G X我是ISSN：X联合国会议所定义的荒漠化对水文条件有着强烈的影响，对环境和发展的影响，中下游的生态环境甚至导致干旱地区土地退化，半干旱半湿润干旱区年代以来黄河干涸的反复发生是多种因素共同作用的结果，包括气候变化，导致了对黄河源区人类交流土地沙漠化生态环境问题的深入研究河流：青海东北部中国科学院中国科学院西藏高原冯建民王桃谢长卫寒冷干旱区环境与工程研究所西藏的地理位置和生态环境问题不仅是青海省的一个特殊的生态问题，而且也是其生态环境的一大威胁近年来，由于自然因素和人为因素共同作用，沙漠化退化速度非常快，荒漠化程度居首位，以往对荒漠化的研究主要集中在共和盆地，缺乏系统的研究全区土地荒漠化分布，根据xx月份实地调查和Landsat TM影像和波段资料，研究区沙漠化土地主要集中在共和盆地和丘陵平原区，在黄河源区青藏高原东北部，沙漠化土地总面积为公里或总面积。
Water pollution is a serious problem. Now hundreds of dead fish can be found on the surface of Haihe River, because in addition to Haihe River, there are some rivers like this. We can't do without water.
Therefore, we must keep water resources and protect ourselves. Our government is taking measures to protect rivers from pollution. People are also aware of the seriousness of pollution.
Everyone starts to use up To fight against water pollution, we can't live without water, but now many rivers are polluted. Hundreds of dead fish can be found on the surface of Haihe River. Because of the serious pollution, drinking water like Haihe is dangerous.
People in other rivers like this are beginning to realize the seriousness of water pollution. Our government is taking measures to protect the rivers from pollution, and people are trying to do so They try their best to protect the river and keep it clean.
Long term earthquake prediction and short-term earthquake prediction can realize long-term earthquake prediction, mainly based on seismologists' research on faults and geological structures (medium and long-term earthquake prediction in the figure is better than climate prediction (long-term weather forecast). Since the earthquake occurs in a place with large geological structure, there will be no earthquake in Ordos platform, such as the stability of geological units and artificial faults Other geological studies have hundreds of years of history and knowledge. It is difficult to judge the long-term earthquake prediction based on the prediction of climate, next year's wet weather, and the place of flood.