排碱沟,顾名思义,就是为排碱而修的沟。其主要功能为排碱、排涝、灌溉、防洪。在五十年代末期,关中平原东部渭北一带地下水沙化严重,国家投入大量资金改良土壤,在渭北平原上修起了大大小小的排碱沟。这些排碱沟长几公里到几十公里,南北纵横,东西交错,相互沟通,沟宽10-20米,水面宽5-10米,水深1-2米,沟内生长着各种鱼儿,有鲫鱼、鲤鱼、草鱼、鲶鱼、甲鱼等,尤其鲫鱼最多。 Alkali caverns, as the name suggests, is to repair the row of alkali and ditch. Its main function is to discharge alkali, drainage, irrigation, flood control. In the late 1950s, the groundwater in the Weibei area of ​​the eastern Guanzhong Plain was seriously savaged. The state invested a lot of money to improve the soil. In the Weibei Plain, large and small underground caverns were built. These alkali discharge gutter a few kilometers to tens of kilometers, north-south aspect, things staggered, mutual communication, ditch width of 10-20 meters, 5-10 meters wide, water depth 1-2 meters, the trench grows with a variety of fish, There are crucian carp, carp, grass carp, catfish, turtle, etc., especially the most carp.