One major problem with conventional "horizontal" farms is loss of water to runoff.

传统“水平”农场的水流失是一个重要问题。

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The principle for water balance analysis is to reversely derive the area of water supply according to runoff amount in the karst system, further to determine the position of the groundwater divide.

水均衡分析法原理是根据岩溶系统径流反推补给面积，进而确定地下水分水岭的位置。

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Collecting it also reduces runoff of storm water to the nearby Potomac River.

VOA: special.2011.07.08

He said those institutions functioned as they should and that is what has led to the runoff vote.

VOA: standard.2009.10.20

According to media reports, he only reluctantly bowed to international pressure for a runoff between him and Dr.Abdullah.

VOA: standard.2009.10.28

The high spring flows would mimic the historic flows of the Missouri, which were larger due to runoff from snow melt.

CNN: Missouri River destiny hangs in the balance

Experts have come up with all sorts of hypothetical ways the E. coli could have gotten into the spinach, from manure that wasn't properly composted to runoff from cattle farms to contaminated irrigation water.

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If no candidate gets a majority of the vote in the first round, the top two will progress to a runoff to be held June 16-17.

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