白居易曾任过三年杭州刺史,当他离任回归时,杭州人民扶老携幼,提着酒壶,洒泪饯别。这种情景,令白居易十分感动,并为此写下一首《别州民》:“耆老遮归路,壶浆满别筵。甘棠无一树,那得泪潸然。税重多贫户,农饥足旱田。唯留一湖水,与汝救荒年。”依依惜别之际,自觉贡献太小,以留下的只有一湖水而感到歉意。其实,白居易留下的是一湖清澈的水、宝贵的水、救命的水。他初到杭州时,西湖面积比现在大得多。由于水利设施失修,一遇连日大雨,就湖水盈溢,使郊区农田遭水涝祸患;如久旱不雨,则又湖水浅涸,不能灌溉。所以 Bai Juyi served as Hangzhou provincial governor for three years, when he left the reunification, the people of Hangzhou, supporting young and old, carrying the jug, tears farewell. This scenario made Bai Juyi very touched and wrote a piece entitled “Bei Zhou Min” for this purpose: “Old Elderly Go-Go Road, pot full of feast.” Kom Tong Hall without a tree, it tears. Only a lake, and save the wilderness years. “” Willing to part with the occasion, consciously contribute too small to leave only one lake and apologize. In fact, Bai Ju left is a lake of crystal clear water, precious water, life-saving water. When he first arrived in Hangzhou, West Lake area is much larger than now. Due to the disrepair of water conservancy facilities, one case of heavy rains in a day, the overflow of the lake, the suburbs farmland waterlogging scourge; such as prolonged drought does not rain, then shallow dry lake, can not irrigate. and so