So despite its long dry season, the water particles are still able to survive. There is a river on the land. Groundwater depth ranges between 60–120 m below the ground surface. This area includes the districts of Playen, Wonosari, Karangmojo and Ponjong, and the central and northern parts of Semanu. South Zone The Southern Zone is called Pegunungan Sewu development area (Duizon gebergton or Zuider gebergton), with an altitude of 0–300 m above sea level. Constituent bedrock is limestone with characteristic conical hills (Conical limestone) and the karst area. Underground rivers are often found in this region. The southern zone includes the districts of Saptosari, Paliyan, Girisubo, Tanjungsari, Tepus, Rongkop, Purwosari and Panggang, and the southern parts of Ponjong and Semanu. Climatology Gunungkidul regency including tropical area, the topography of a region dominated by karst region area. The southern region is dominated by karst region, that are numerous natural caves and underground rivers flowing. Under these conditions cause the condition of the land in the southern area which resulted in less fertile agricultural cultivation in this region is less than optimal. Gunungkidul climatological conditions generally exhibit the following conditions: The average rainfall in 2010 amounted to 1954.43 mm/year with the number of rainy days an average of 103 days/year. Wet months 7 months, while the dry months range from 5 months. Gunungkidul north region has the highest rainfall over central and southern regions. Gunungkidul southern region has the most rain beginning late Temperatures daily average of 27.7 °C, minimum temperature of 23.2 °C and a maximum temperature of 35 °C. Relative humidity ranging between 80% - 85%, not too influenced by the high places, but more influenced by the seasons. Heirloom Tombak Kyai Marga Salurung Tombak Kyai Marga Salurung is one of heirloom gift from the King of Yogyakarta, Hamengkubuwono X on Sunday, May 27, 2001, when the Celebration of 170th Anniversary of Gunungkidul Regency. Spear heirloom that has a new dhapur cekel, warangka kajeng sanakeling symbolize that the district government of Gunungkidul still has a major commitment to achieve lofty ideals are deeply rooted and always siding with the people. The leaders and the people have the attitude or the direction salurung approval, accord, saiyeg - saeka- kapti in the corridors of democracy, which means heavy hands make light work, conscious of their rights, but also respect the rights of others and known for certain obligations. Tombak Kyai Panjolo