How does the land and sea position affect the sunshine duration?

1, long day; 2. Terrain (high terrain, early sunrise, late sunset and long sunshine time); 3. Weather conditions.

Second, the factors that affect the intensity of solar radiation (that is, the factors that affect the weakening effect of the atmosphere on solar radiation) 1, the height of the sun (that is, latitude); 2. Weather conditions; 3. topography; 4. Air density. For example, why is the solar radiation on the Qinghai-Tibet Plateau the strongest? (1) Low latitude and high sun; ② More sunny days; ③ High terrain; ④ The air is thin and the atmosphere is clean.

Thirdly, the factors that affect the temperature are 1 and latitude; 2. Topography; 3, the underlying surface properties (land and sea location, vegetation status); 4. Weather conditions.

Fourth, the factors affecting the temperature annual range and their changing rules 1, latitude: low latitude is small, high latitude is large; 2. The nature of underlying surface: the ocean is smaller than the land, the coast is smaller than the inland, and the vegetation is smaller than the bare land; 3. Weather conditions: The places with more clouds and rain are smaller than those with less clouds and rain.

5. Upstream of river regulation measures: the principle of regulation is flood regulation, which is to build reservoirs and plant trees; Mid-stream: the principle of flood control is to store flood separately, by building reservoirs and storing flood separately; Downstream: the principle of regulation is flood discharge and water control, and the methods are to reinforce dikes, dredge rivers and dig rivers.

Analysis of natural causes of river flood (mainly from three aspects: water system characteristics, hydrological characteristics and climate characteristics); Man-made reasons (mainly from two aspects: vegetation destruction, reclamation of lakes).