{
    "success": true,
    "data": {
        "id": 1596788,
        "msgid": "why-do-kemang-and-mampang-always-flood-an-analysis-of-the-causes-and-solutions-for-2026-1772968214",
        "date": "2026-03-08 16:05:00",
        "title": "Why Do Kemang and Mampang Always Flood? An Analysis of the Causes and Solutions for 2026",
        "author": "Irvan Sihombing",
        "source": "MEDIA_INDONESIA",
        "tags": "",
        "topic": "Infrastructure",
        "summary": "An in-depth analysis of why flood risk in Kemang and Mampang persists beyond heavy rainfall, focusing on topography (The Valley Effect), Kali Krukut bottlenecks, and urbanisation that reduces permeable surfaces. It outlines near-term mitigations such as widening Kali Krukut and deep well injection, and stresses the need for consistent policy and planning to create a water-friendly Jakarta.",
        "content": "<p>For residents of South Jakarta, the Kemang and Mampang Prapatan area\nhas long been associated with two things: a dynamic urban lifestyle and\nfloods that arrive suddenly. To blame heavy rainfall as the sole cause\nwould be a major error. There are technical, historical and geographical\nreasons that make this area seem like a reservoir for both upstream and\nlocal water. Technically, Kemang sits atop a land structure resembling a\nvalley or basin. If you look at the contour map of South Jakarta, Kemang\nRaya and its surroundings have elevations far lower than surrounding\nareas such as Kebayoran Baru or Cilandak. This topography creates what\nhydrologists call The Valley Effect. When it rains, water naturally\nseeks the lowest point. Without a drainage system capable of countering\ngravity with large pumps, Kemang will always be the outlet for water\nfrom the surrounding areas. A second hidden reason lies in the anatomy\nof Kali Krukut. This river is the main drainage artery in Kemang, but it\nsuffers a bottleneck (narrowing). In several points behind Kemang\u2019s\ncommercial district, the river width, which should be about 20 metres,\nhas drastically reduced to only 5\u20136 metres due to property development\nbuilt too close to the riverbank. In 2026, although normalisation\nprojects continue, the volume of water coming from upstream (Depok and\nBogor) often arrives in Kemang at the same time as the peak local\nrainfall, creating a collision of flows that triggers instant overflow.\nThree decades ago, Kemang was a green expanse with many small wetlands\nand open land. However, the transformation into an elite commercial\ndistrict has changed 70% of its surface to concrete and asphalt. The\nimpermeable nature of concrete causes rainwater not to infiltrate the\nground but to become runoff that fills the streets. Have you ever seen\nwater coming out from drainage channels onto the streets, when it should\nbe the other way around? This is the backwater phenomenon. Because the\ndrainage outlets in residential areas are now lower than the surface of\nKali Krukut, which is overflowing, river water actually flows back into\nthe city\u2019s drainage system. Is living in Kemang still safe from floods?\nIt depends on the specific elevation of the street. The Kemang Timur and\nKemang Utara IX areas remain the most vulnerable. However, homes with\nindependent polder systems are increasingly in demand. What are the\npermanent solutions for the Mampang\u2013Kemang floods? Consistent widening\nof Kali Krukut and the construction of deep well injection wells to\nrestore the soil\u2019s function as an absorber of water. Addressing floods\nin Kemang and Mampang will require time and policy consistency. However,\nby understanding the hidden reasons behind floods, communities and\ngovernment are expected to work together to manage land use planning\nthat is more water-friendly in the future. Trace the root causes of\nJakarta\u2019s floods from geology to urbanisation. Read the JakTirta project\nanalysis and flood mitigation strategies for the capital. Heavy rain\nfrom Saturday to Sunday (7\u20138\/3) triggered floods in Jakarta. The Jakarta\nBPBD recorded 147 RTs and 19 roads affected. Flood updates for North\nJakarta today, Saturday 31 January 2026: Marunda and Kapuk Muara\ninundated due to river overflow and heavy rainfall. Jakarta Governor\nPramono Anung has ordered the extension of weather modification\noperations from the previously stated end date of 23 January to 27\nJanuary. Floods up to 1.5 metres in the Kebon Pala, Jatinegara, East\nJakarta, show no signs of subsiding. PT Transportasi Jakarta (TJ) has\nadjusted services on 17 routes to safeguard passengers. The settlement\nof RW 04 Cipinang Melayu, East Jakarta, was flooded up to 1.5 metres due\nto the Sunter River overflow. The effort should meet the needs of\nresidents within the housing complex, not attract outsiders.<\/p>",
        "url": "https:\/\/jawawa.id\/newsitem\/why-do-kemang-and-mampang-always-flood-an-analysis-of-the-causes-and-solutions-for-2026-1772968214",
        "image": ""
    },
    "sponsor": "Okusi Associates",
    "sponsor_url": "https:\/\/okusiassociates.com"
}