Otaru Shenga
Otaru considers this for a moment, then whispers to Sen
"Allow me to check for a moment. Stay here." He leaves Sen and the others where they were, creeping towards the spot where Sen had stopped, and focuses his senses on the element of water.
[sblock=ooc]Otaru's Hide and Move Silently bonuses are each +2, after Dex and armor check. His Listen and Spot are +1, and his Spellcraft is +1.
Otaru will go forward 30 feet as Sen had done, going at half speed to move silently without penalty (not that he's very good at it to begin with), stop by the outcropping, and concentrate for a few moments on his Sense Elements ability, sensing any sources of water nearby (including living creatures, of course). With the first round of concentration he senses water sources out to 10 feet, 15 feet after 2 rounds, and 20 feet after 3 rounds (the furthest range he can sense at this level).
If he detects any sources of water within range, Otaru will concentrate on the largest source first for 1, 2, 3, or 4 rounds, the longest he's willing to bother;
he makes a Spellcraft check on each of those rounds to try and identify basic facts of the water source, and since he's not very good at Spellcraft, he's likely going to need those retries.
After he uncovers some information on the water source (or wastes 4 rounds trying), Otaru will focus on the next-largest water source within range and repeat the process. If there are no others, he'll just creep back over to the group.
The Spellcraft DC, according to Oriental Adventures, is 20 to learn the general location (the 5-foot space it's in, or nearest 5-foot space that it occupies if bigger), 25 to determine if it's a natural source of water (like a creature or a puddle) or a spell effect, 30 to determine if it's a creature or an object, and 35 to determine its exact nature (human, clean water, filthy water, rat, or whatever). Otaru will be lucky if he makes a DC 20 check.
[/sblock]