DAFTAR ISI

HALAMAN JUDUL .................................................................... i LEMBAR PENGESAHAN ......................................................... iii ABSTRAK .................................................................................... v ABSTRACT .................................................................................. vii KATA PENGANTAR .................................................................. ix DAFTAR ISI ................................................................................. xiii DAFTAR TABEL ........................................................................ xv DAFTAR GAMBAR .................................................................... xvii DAFTAR PETA ........................................................................... xix BAB I PENDAHULUAN 1.1 Latar Belakang ......................................................................... 1 1.2 Rumusan Permasalahan ................................................................................. 5 1.3 Tujuan dan Sasaran .................................................................. 5 1.4 Ruang Lingkup ......................................................................... 6 1.4.1 Ruang Lingkup Wilayah .................................................. 6 1.4.2 Ruang Lingkup Pembahasan ............................................ 13 1.4.3 Ruang Lingkup Substansi ................................................ 13 1.5 Manfaat Penelitian ................................................................... 13 1.6 Sistematika Penulisan ........................................................................................ 14 BAB II TINJAUAN PUSTAKA 2.1 Bencana .................................................................................... 17

2.1.1 Pengertian Bencana .......................................................... 17 2.1.2 Penyebab Bencana ........................................................... 17 2.1.3 Risiko Bencana ................................................................ 18

2.2 Banjir ....................................................................................... 20 2.2.1 Pengertian Banjir ............................................................. 20 2.2.2 Jenis dan Karakteristik Banjir .......................................... 21

2.3 Daerah Aliran Sungai .............................................................. 23 2.3.1 Pengertian Daerah Aliran Sungai ..................................... 23 2.3.2 Bentuk Daerah Aliran Sungai .......................................... 24

2.3.3 Faktor-faktor yang mempengaruhi aliran sungai ............. 26 2.3.4 Pengendalian Banjir .......................................................... 28

2.4 Mitigasi .................................................................................... 33 2.5 Ancaman Bahaya ..................................................................... 37 2.6 Kerentanan ................................................................................ 39 2.7 Kerentanan Fisik Bencana Banjir ............................................. 43 2.8 Kerentanan Sosial Bencana Banjir ............................................ 45 2.9 Kerentanan Ekonomi Bencana Banjir ....................................... 48 2.10 Kerentanan Lingkungan Bencana Banjir ................................ 50 2.11 Sintesa Kajian Teori ................................................................ 60 BAB III METODE PENELITIAN 3.1 Pendekatan Penelitian .............................................................. 65 3.2 Jenis Penelitian ........................................................................ 65 3.3 Variabel Penelitian .................................................................. 66

3.3.1 Mengidentifikasi Karakteristik Bahaya Bencana Banjir Akibat Luapan DAS Kali Gembong Pasuruan ...... 66

3.3.2 Mengidentifikasi Faktor - faktor yang Berpengaruh Terhadap Kerentanan Bencana Banjir Akibat Luapan DAS Kali Gembong Pasuruan ............................. 67

3.3.3 Menentukan zonasi Kerentanan Bencana Banjir Akibat Luapan DAS Kali Gembong Pasuruan ................. 69

3.3.4 Menentukan Zonasi Risiko Bencana Banjir Akibat Luapan DAS Kali Gembong Pasuruan ............................. 72

3.4 Populasi dan Sampel Penelitian ............................................... 72 3.5 Metode Penelitian .................................................................... 75

3.5.1 Metode Pengumpulan Data .............................................. 77 3.6 Metode Analisis ....................................................................... 77

3.6.1 Mengidentikasi Karakteristik Bahaya Banjir Akibat Luapan DAS Kali Gembong Pasuruan ............................. 77

3.6.2 Mengidentifikasi Faktor-faktor yang Berpengaruh Terhadap Kerentanan Bencana Banjir Akibat Luapan DAS Kali Gembong Pasuruan ............................ 79

3.6.3 Analisis Perumusan Zonasi Kerentanan (Vulnerability) ................................................................. 83

3.6.4 Menentukan Zonasi Risiko Bencana Banjir Akibat Luapan DAS Kali Gembong Pasuruan ............................ 83

3.7 Tahapan Penelitian .................................................................... 83 BAB IV HASIL DAN PEMBAHASAN 4.1 Gambaran Umum .................................................................... 87

4.1.1 Kondisi DAS Kali Gembong Pasuruan ............................ 87 4.1.2 Kondisi Fisik Dasar .......................................................... 91

4.1.2.1 Hidrologi ............................................................... 91 4.1.2.2 Kondisi Topografi ................................................. 92 4.1.2.3 Kondisi jenis tanah ................................................ 95 4.1.2.4 Kondisi Klimatologi .............................................. 95 4.1.2.5 Pasang Surut Air Laut ............................................ 96

4.1.3 Kondisi Kependudukan .................................................... 101 4.1.3.1 Jumlah dan Kepadatan Penduduk .......................... 101 4.1.3.2 Laju Pertumbuhan Penduduk ................................. 107 4.1.3.3 Jumlah Penduduk Usia Tua dan Balita .................. 109 4.1.3.4 Jumlah Penduduk Yang Bekerja Di Sektor

Rentan ........................................................................................ 117 4.1.3.5 Jumlah Penduduk Miskin ....................................... 119

4.1.4 Kondisi Penggunaan lahan ............................................... 127 4.1.5 Kepadatan Bangunan dan Jaringan Jalan DAS Kali

Gembong .......................................................................... 133 4.1.6 Kondisi Banjir Akibat Luapan DAS Kali Gembong

Pasuruan ........................................................................... 141 4.2 Analisis Identifikasi Karakteristik Ancaman Bahaya

Banjir Akibat Luapan DAS Kali Gembong Pasuruan .............. 144 4.2.1 Ketinggian Genangan ........................................................ 145

4.2.2 Durasi Genangan .............................................................. 153 4.2.3 Zonasi Tingkat Bahaya Bencana Banjir Akibat

Luapan DAS Kali Gembong Pasuruan ............................. 161 4.3 Analisis Penentuan variabel-variabel yang berpengaruh

terhadap kerentanan bencana banjir akibat luapan DAS Kali Gembong Pasuruan ........................................................... 170

4.3.1 Analisa Deskriptif ............................................................. 170 4.3.2 Analisa Delphi................................................................... 176 4.3.3 Analisa AHP .................................................................... 187

4.4 Analisa Perumusan Zonasi Kerentanan Banjir Akibat Luapan DAS Kali Gembong Pasuruan .................................... 193

4.4.1 Kerentanan Aspek lingkungan ......................................... 194 4.4.1.1 Proses Analisa Overlay Weighted Sum ................ 215

4.4.2 Kerentanan Aspek Fisik ................................................... 216 4.4.2.1 Proses Analisis Overlay Weighted Sum ............... 225

4.4.3 Kerentanan Aspek Sosial ................................................. 226 4.4.3.1 Proses Analisis Overlay Weighted Sum ............... 239

4.4.4 Kerentanan Aspek Ekonomi ............................................ 240 4.4.4.1 Proses Analisis Overlay Weighted Sum ............... 249

4.5 Zonasi Tingkat Kerentanan Bencana Banjir Akibat Luapan DAS Kali Gembong ................................................... 259

4.6 Analisis Penentuan Zonasi Risiko Bencana Banjir Akibat Luapan DAS Kali Gembong ................................................... 265

BAB V KESIMPULAN DAN SARAN 5.1 Kesimpulan .............................................................................. 273 5.2 Rekomendasi ............................................................................ 275