Any owner has the right to use and dispose of rainwater that falls on his land.
If the use of this water or the direction given to it aggravates the natural flow easement established by article 640, compensation is due to the owner of the lower land.
The same provision applies to water from springs originating on a piece of land.
When, through boreholes or underground works, an owner causes water to emerge in his land, the owners of the lower land must receive it; but they are entitled to compensation in the event of damage resulting from its flow.
Houses, yards, gardens, parks and enclosures adjoining dwellings may not be subject to any aggravation of the drainage easement in the cases provided for in the preceding paragraphs.
Disputes to which the establishment and exercise of the easements provided for in these paragraphs and the settlement, if any, of compensation due to the owners of the lower land may give rise shall be brought, in the first instance, before the judge of the judicial court of the canton, who, in making his decision, must reconcile the interests of agriculture and industry with the respect due to property.
If an expert opinion is required, only one expert may be appointed.