延河

In Yan River watershed, oil runoff pollution is an important pollution form of surface water body.

延河流域石油类污染物的暴雨径流污染是当地地表水体的一种重要污染形式。

It can be provided some scientific bases to assess the water environment situation of Yanhe River.

为合理评价延河水环境状况提供一定的科学依据。

Yanhe River watershed, and show nearly East-West from the integration of areas in the central passage.

南河与秀延河分水岭近东西向从整合区中部通过。

Yanhe spring karst water system is one of the famous springs in North China.

山西省延河泉岩溶水系统是我国北方岩溶大泉之一。

With the increase of petroleum resource exploitation in Northern Shaanxi during recent decades, the quality of surface water of Yanhe River and Qingjianhe River is affected seriously.

近几十年来陕北地区油气大规模的开采，对延河和清涧河流域地表水水质状况造成严重影响。