The surface of the ancient pond was covered with brown mudThe surface of the ancient pond was covered with brown mud
Reflection of a watermill on the surface of the water in the eveningReflection of a watermill on the surface of the water in the evening
Постоянный водный поток значительных размеров с естественным течением по руслу от истока вниз до устья. Поток, большое количество, масса.