东北西部、华北北部地区是京津唐地区和东北东部重工业基地、山西能源基地沙尘暴天气的主要尘源区和水土流失源区。同时，这个地区属半干旱区，春旱严重，又多大风，属于生态脆弱区，就是已治理好的沙漠化土地在长期干旱和人为作用下仍有死灰复燃的可能性，暗沙仍可能转化为明 The western part of northeastern China and northern part of North China are the major dust source areas and source areas of sand and dust storm in Beijing-Tianjin-Tangshan area and northeast east heavy industry base. At the same time, the area is a semi-arid area, where the severe spring and the heavy winds belong to ecologically fragile areas, that is, the desertification of well-controlled desertified lands still has the possibility of resurgence under long-term drought and human-induced effects. The shrubs may still turn into bright