辽宁省朝阳县降水量盈亏与干旱情况分析

从朝阳县降水量与作物需水量之间的关系出发,应用作物水量平衡公式和干旱指数法,探讨朝阳地区自然降水的盈亏与干旱情况。结果表明,朝阳年平均缺水量约为130 mm,严重缺水时段集中在春秋两季,且以春季缺水最为突出,从而使得干旱年景占到了80.0%,其中重旱、严重干旱年景占42.2%。

Analysis of Precipitation Profit and Loss in Chanyang County of Liaoning Province and Its Drought Situations

Starting from the correlation between precipitation and crop water requirement in Chaoyang County,the profit and loss of natural precipitation and the drought situations in Chaoyang Area were discussed by using the balance formula of crop water requirement and drought index method.The results showed that the annual average water shortage in Chaoyang County was about 130 mm.The serious water shortage period was concentrated in the spring and autumn,and the water shortage was most prominent in spring.Thus the drought harvest patterns occupied 80.0% and the heavy drought harvest patterns and severe drought harvest patterns occupied 42.2%.