Adding Carbon Sinks In Upper Reaches Of The Yangtze River And It's Pre-warning

The severest floods which broke out on the upper reaches of the Yangtze River in 1998 not only caused serious losses of life and property, but also it has brought serious damage to the natural environment. The middle and lower reaches of the Yangtze River and Dongting Lake, Poyang Lake turned-soaked collapse of 1075, the total area inundated was 321,000 hectares, including 197,000 hectares of arable land. 2.29 million people were bitted by this natural calamity. The direct economic losses amounted to more than 200 billion dollars. The flood is not just a simple natural phenomenon, but a threat to the sustainable development of the national economy. According to the study, the adding carbon sinks is closely linked with the emergence of such a phenomenon.Under this circumstance, the further study of the environment of the upper reaches of the Yangtze River, as well as carbon change is a necessary task. According to the RS image, statistical data and the result of fieldwork, the study used carbon sinks monitoring methods to monitor the carbon sinks as well as the situation of adding carbon sinks. The first step is to choose the region that was researched, and then establish monitoring standards. In this region, according to the types of ecosystems, some ecological system biomass monitoring points and soil carbon sinks monitoring points were laid on each ecosystem; The second step is to design the means to monitor carbon sinks, situation of adding carbon sinks and pre-warning situation of adding carbon sinks . The third step is to account the carbon sinks of farmland, grassland, shrub, and sparsely forested woodland, according to the vegetation, land use, soil distribution. The forth step is to account carbon emission and carbon sinks according to the industrial emissions and land-use changes in the upper reaches of the Yangtze River and the gained the situation of adding carbon sinks ; Last step is to choose a typical area and pre-warn the adding carbon sinks. The results show that, in 2000, the carbon sinks of the broadleaf forest in areas of the upper reaches of Yangtze River is 1356413.6 ton; the coniferous-leaf forest is 519430152.2 ton; the broadleaf and coniferous-leaf mixed forest is 5327318.4 ton; the entire forest is 526113884.2 ton; the high-covered grassland is 1365913.6 ton; the middle-covered grasslands is 529635624.2 ton; the low-covered grassland is 5348578.4 ton; the woodland is 89670042.2 ton; the shrubs is 40804309.2 ton; the irrigated paddy field is 10518105.2 ton, the dry land is 23996987.2 ton. In 2005, the broad-leaved forest is 1365913.6 ton; the coniferous-leaf forest is 529635624.2 ton; the broad-leaf and coniferous-leaf mixed forest is 5348578.4 ton; the entire forest is 536350116.2 ton; the high-covered grassland is 5531954 ton; the middle-covered grassland is 17345766.2 ton; the low-covered grassland is 28454867.2 ton; the woodland is 89676482.2 ton; the scrubs is 40826545.2 ton; the paddy fields is 10965635.2 ton, the dry land is 26538458 ton. Between the year of 2000 and 2005, in the area of upper reaches of the Yangtze River, the carbon sinks is 256.4 million ton and the number of the typical area that was choosed is 49343.65ton, the pre-warning grade level is first level (green areas).