Tex. Water Laws ch. 3, art. 7818
Any petitioner or taxpayer in such district may appeal from the findings of said court to the district court of said county. Such appeal shall be perfected within five days after the rendition of the order appealed from, in the following manner: notice of appeal shall be given and entered of record on the minutes of said court, at the time of the entry of said order by announcement of same before said court, or by giving written notice within two days after the entry of such order by a simple statement that the undersigned gives notice of appeal from the order entered on the date stated, and by filing such written notice with the county clerk; and by filing an appeal bond with two or more good and sufficient sureties for one hundred dollars, payable to the county judge and approved by the county clerk, and conditioned upon the due prosecution of the appeal and payment of all costs incident thereto. Unless appeal is so perfected, such order shall be final and conclusive.
Tex. Water Laws ch. 3, art. 7818