Read Figure 1 and answer questions (1) The height difference in the Jinsha River section (from Yushu to Yibin) is about ______ meters. A is the largest water conservancy project on the Yangtze River i

Read Figure 1 and answer questions (1) The height difference in the Jinsha River section (from Yushu to Yibin) is about ______ meters. A is the largest water conservancy project on the Yangtze River in my country.

(1) The drop in the Jinsha River section (from Yushu to Yibin) is about 2,300 meters. A is the Three Gorges, my country's largest water conservancy project on the Yangtze River. The reason why this section of the river is rich in water energy resources is that it is located at the junction of the second and third terraces of the terrain. The river has a large drop, receives more precipitation, and is rich in water resources.

(2) Wuhan is located in the middle reaches of the Yangtze River. The flow change diagram of this river section reflects that eastern my country is affected by the monsoon, and precipitation has the significant characteristic of being concentrated in summer and autumn. In summer and autumn, the most common natural disaster in the middle and lower reaches of the Yangtze River is floods.

(3) The sediment growth of the Yellow River is most significant in the middle reaches. The main terrain area through which this river section flows is the Loess Plateau. The landform is characterized by thousands of ravines and fragments. The serious ecological and environmental problem in this terrain area is water and soil erosion. The fundamental measure for governance is to strengthen soil and water conservation in the Loess Plateau area.

(4) The north-south main railway line passing through City B, Wuhan, is the Beijing-Guangzhou Line, as shown in the picture. It transports rich coal resources in the middle reaches of the Yellow River to the Yangtze River Basin

(5) Picture 2 Mainly occurs in the lower reaches of the Yellow River. The fundamental measure for management is to carry out soil and water conservation work in the upper and middle reaches of the Yellow River, especially in the Loess Plateau.

So the answer is:

(1) 2300; Three Gorges; located at the junction of the second and third terraces of the terrain, with a large river drop; more precipitation and abundant water resources;

(2) Summer and autumn; floods;

(3) Middle reaches; Loess Plateau; thousands of ravines and fragments; water and soil erosion; strengthening soil and water conservation in the Loess Plateau area;

(4) Beijing-Guangzhou; Coal resources;

(5) Yellow River; Carry out soil and water conservation work in the upper and middle reaches of the Yellow River, especially the Loess Plateau.