The suspended load is mainly grains sand and dash from volcanic activity of Mount Merapi. The debit flow in Table 3.2 when compared to total demand of 428.13
personday ×120 liter = 51375.6 literday 0.0059 m
3
s indicates that the area is abundant of water sources.
3.3 Sand dune in Parangtritis
The requirements of the establishment of sand dune according to Debyosaputro 1997 are the followings: clear distinction between wet and dry season, the material
of grains sand abundant, the flat space and open, the win velocity. The higher wind velocity will be able to move more grain sand. Steady wind velocity of 50 kmh can
move approximately one half ton of sand per day over a square meter section of dune. Intermediate sized 0.25mm – 0,5mm grains sand move most easily. It is the largest
and the smallest sand particles that require the strongest winds to move. The larger particles are heavier, and thus require stronger winds. Small particles are difficult to
move because they exhibit a mutual cohesiveness and because they usually present a smooth surface to the wind.
These requirements are available in this Parangtritis area. The existing condition shows that there are more than a hundred sand dunes.
Sand dune in Bantul is the biggest and the most complete type in South East Asia. There are four types of sand dunes based on physical perform in Parangtritis.
According to Kapala 1998 the types of sand dunes that can be found are 70 barchans, 80 of longitudinal type, 30 of parabolic type and 10 sweeps. The barchans
and longitudinal type utilize 70 ha 25 of sand dune, and were still active, while others were not.
19
3.4 Flora and fauna
Flora is closely related to the types of fauna that can grow and exists. Specific kinds of vegetation are Cynodong dactylongrintingan, Andropogonrumput jarum and
Spninifex rumput lari, it grows in the sand dune ecosystem beside Pandanus tectorius Prkpandan. It is categorized as endemik and pionery vegetation for sand dune before
the occupation of other vegetations . The rehabilitation activity in 1988 planted Akasia and Annacardium at the path of sand dune, with soil treatment of adding of organic
matter. Table 3.3 shows kinds of flora and fauna found in Parangtritis.
Table 3.3 Flora and fauna in Parangtritis.
No Flora Fauna
1 2
3 4
5 6
7 8
9
10 11
12 13
14 15
16 17
18 19
20 21
22 23
24 25
Akasia Famesiana Akasia Amarantus Spinosus bayam duri
Glyricydae Seppium gamal Annacardium Accidentalejambu monyet
Plumeria acuminate kamboja Ipomea aquatica kangkung
Coccina corditila kebuan Cocoi nuciverakepala
Gangsa tridax procumbenekerpusan Portudacakrokot
Virtex trifolialegundi Leucas indicaleng-lengan
Phylantus minuri meniran Pandanus tectorius Prkpandan
Euphorbia hirtapatikan Cynodong dactylongrintingan
Andropogonrumput jarum Spninifexrumput lari
Balungan wulisina indicarumput mbakonan Cyperus rotundusrumput teki
Abrus precatoriussogok telik Borassus sudaicatal
Jussieva oleraceatapak dara Lantana camaratelekan
Tobaccotembakau Aphilidaekutu penghisap
HemipteraKepik Paradoxurus hermaproditusMusang
Coleoptera famili scarabidae Larva Achatina Fulica hermaproditsiput
bapak pucung Lalat
Belalang Semut
tikus gumuk Laba-laba
Cicak Tawon sebra
Jengkerik Burung cablak
Burung tekukur Belalang
Burung emprit Burung ences
Burung prenjak Burung branjangan
Burung bangau Katak pohon
Sources: Kapala , 1999
3.5 Profile of Population
