Geomorphological Development of the Muria Palaeostrait in Relation to the Morphodynamics of the Wulan Delta, Central Java
Year: 2008
Type: article
Abstract: The research area is situated in the Demak, Jepara, Pati and Kudus\nregencies of the CentralJava Province. The objectives of the research are: (1) the\ninvestigation of the geomorphologic development of the Muria Palaeo-Strait in\nCentral Java and (2) the analysis of the morphodynamicsof the WulanDelta. A\nmorphographic- morphogeneticapproach was used to interpret the genesJsand\nsubsequent evolution of the coastal lowlands in the surroundings of the Muria\nVolcano. The data analysis techniques, based on cause-effect assessment and\nanalogy, were implemented in four steps, such as: (a) descriptive, (b) comparative,\n.(c) associative and (d) causative stages. The results of the research can be\nsummarized as follows: The coastal plain situated to the south of the Muria\nVolcano was originally a shallow strait and subsequently became a mangrovecovered\ntidal flat with many creeks. Ultimately this tidal flat evolved into an\nalluvial/coastal plain with natural levees and back swamps. The coastal area in the\nwest was still inundated by the sea around 6,000 yrs BP. This is evidenced by the\n14C-dating 6,530 + 120 yrs BP of a coral reef situated at 25 cms a.s.l. The present\nbeach ridge has an age 4,600 + 100 yrs BP and originated as a barrier bar. The\ncoastal area in the east is characterized by the occurrence of four sequential beach\nridge complexes at elevations of 580, 520, 220 and 125 cms respectively. They\nhave been 14C-dated 5,860 + 110 yrs BP, 5,090 + 100 yrs BP, 3,530 + 100 yrs BP\nand 1,760 + 120 yrs BP. Since 1,760 yrs BP nofurther beach ridges wereformed,\na tidal flat developed instead. The shape of the Wulan Delta changed from actuate\nto digit ate in the period of 1925 - 1995, mainly due to human interference with the\nriver for purposes of irrigation. The growth of the Wulan Delta affected the hydro\ndynamical situation offshore of Jepara. These hydrodynamic changes resulted in\nmarine erosion in the rural areas in the Jepara Regency and chewier formation in\nthe rural areas of the Demak Regency.
Source: Indonesian Journal of Geography
DOI: 10.22146/ijg.2257
Author: Sunarto Sunarto
Language: English
Subfield: Earth-Surface Processes
Field: Earth and Planetary Sciences
Domain: Physical Sciences
Open Access status: gold
OpenAlex ID: W2154356363